South Korea's president has apologised for the government's inept response to the ferry disaster as the death toll climbed to more than 190. It came as divers fought strong currents in their search for more than 100 passengers still missing nearly two weeks after the accident. The government also raised the death toll for what has become a point of national mourning and shame to 193. Most of the dead and missing are high school students. Scroll down for video . 'Heavy-hearted': South Korean President Park Geun-Hye pays her respects at a memorial altar for victims of the sunken ferry in Ansan before issuing a public apology for the government's handling of the disaster . Meanwhile, the chief executive of the ferry operator, Chonghaejin Marine, was summoned to the prosecutor's office as part of its investigations into the disaster. Kim Han-Sik appeared frail and wore a face mask as he was helped by two men into the building before being questioned. Divers are largely using their hands . to feel for remaining bodies as they make their way through a maze of . dark cabins, stairwells, storage rooms, lounges and restaurants in the . submerged ferry, which flipped upside down as it sank on April 16. Under suspicion: Some of the ferry's crew members leave the Mokpo coastguard office after being arrested on charges of causing the deaths of passengers through abandonment before being transferred to prosecutors . Frail: Kim Han-Sik (Centre), the CEO of Chonghaejin Marine, the operator of the sunken ferry, arrives at the prosecutor's office in the western port city of Incheon as part of its widening investigations into the disaster . But . they must fight strong currents swirling around the ferry and, once . inside, overturned furniture, mattresses and other debris floating in . the murky, sediment-heavy waters. President . Park Geun-hye’s apology, and the earlier resignation of her prime . minister, comes amid rising indignation over claims by the victims' relatives that the government did not do enough to rescue or protect . their loved ones. She said . at a cabinet meeting at the presidential Blue House that South Korea has . 'lost many precious lives because of the accident and I am sorry to the . public and am heavy-hearted'. She says the government could not prevent the accident and 'the initial response and remedy were insufficient'. Humble: President Park bows before the memorial altar (left) then consoles a relative (right) of one of the victims of the sunken ferry . In mourning: Relatives of a passenger of the sunken ferry Sewol weep as they pay tribute to victims at Ansan city's official memorial altar at the Hwarang Recreation Park . In their memory: A funeral service employee sets up a portrait of a victim on the group memorial altar . Ms Park had earlier visited a memorial . set up in Ansan, the city near Seoul where the high school students are . from to pay her respects to victims. Wearing a black dress and white gloves, she laid flowers at an altar and bowed her head. According to local media, some angry family members of victims shouted at her and demanded an apology. She listened to them for 10 minutes before leaving. Investigators, . meanwhile, are expanding their probe into both the cause of the ship's . sinking and the initial response by emergency workers. Heartache and anger: The memorial comes amid rising indignation over claims by the victims' relatives that the government did not do enough to rescue or protect their loved ones . Grief: South Korean nuns pay a tribute at a group memorial altar as the government raised the death toll from the ferry disaster to 193 . Emotions running high: According to local media, some angry family members of victims shouted at the South Korean President and demanded an apology when she visited the memorial . Officials have searched the two service centres that deal with vessel traffic and that communicated with a crew member on the ferry during the sinking, seized documents and recordings from a coast guard office in Mokpo. They have also continued questioning the captain, the third mate and the helmsman who were on the bridge when the ship began listing. Only 174 people survived the sinking, including 22 of the 29 crew members. The government is making initial plans to eventually salvage the ferry, but has indicated it will not do so until search efforts end. Sombre: Mourners carry portraits of victims of the sunken ferry Sewol as divers fought strong currents in their search for more than 100 passengers still missing nearly two weeks after the disaster . Sad: Children wait to pay tribute to the victims of the ferry, most of whom were high school pupils . Paying tribute: Senior prosecutor Yang Jung-jin said that the cause of the sinking could be due to excessive veering, improper stowage of cargo, modifications made to the ship and tidal influence . All 15 crew members responsible for the ship’s navigation have been arrested, but they have not been formally charged yet because investigations are still going on. The arrested crew members are accused of negligence and of failing to help passengers in need. Captain Lee Joon-seok initially told passengers to stay in their rooms and took half an hour to issue an evacuation order, by which time the ship was tilting too severely for many people to get out. He told reporters after his arrest that he withheld the evacuation order because rescuers had yet to arrive and he feared for passengers’ safety in the cold, swift water. huge loss of life: Only 174 people survived the sinking, including 22 of the 29 crew members . Praying for the dead: South Koreans gather to bow in memory of the victims and missing passengers aboard the sunken ferry boat Sewol, while demanding the government take responsibility for the disaster . The ferry was carrying an estimated 3,608 tons of cargo, according to an executive of the company that loaded it. That far exceeds what the captain claimed in paperwork - 150 cars and 657 tons of other cargo, according to the coastguard - and is more than three times what an inspector who examined the vessel during a redesign last year said it could safely carry. Senior prosecutor Yang Jung-jin said that the cause of the sinking could be due to excessive veering, improper stowage of cargo, modifications made to the ship and tidal influence. Mourners bow in memory of the victims in Seoul as prosecutors widen their investigation in the disaster .
President Park Geun-hye laid flower at memorial for victims of disaster .
Said the country had 'lost many precious lives and I am heavy-hearted'
Comes as divers continue search for more than 100 missing passengers .
Government raises death toll, most of them high school students, to 193 .
Prosecutors seize documents and recordings from a coast guard office .
South Korea's president has apologised for the government's inept response to the ferry disaster as the death toll climbed to more than 190. It came as divers fought strong currents in their search for more than 100 passengers still missing nearly two weeks after the accident. The government also raised the death toll for what has become a point of national mourning and shame to 193. Most of the dead and missing are high school students. Scroll down for video . 'Heavy-hearted': South Korean President Park Geun-Hye pays her respects at a memorial altar for victims of the sunken ferry in Ansan before issuing a public apology for the government's handling of the disaster . Meanwhile, the chief executive of the ferry operator, Chonghaejin Marine, was summoned to the prosecutor's office as part of its investigations into the disaster. Kim Han-Sik appeared frail and wore a face mask as he was helped by two men into the building before being questioned. Divers are largely using their hands . to feel for remaining bodies as they make their way through a maze of . dark cabins, stairwells, storage rooms, lounges and restaurants in the . submerged ferry, which flipped upside down as it sank on April 16. Under suspicion: Some of the ferry's crew members leave the Mokpo coastguard office after being arrested on charges of causing the deaths of passengers through abandonment before being transferred to prosecutors . Frail: Kim Han-Sik (Centre), the CEO of Chonghaejin Marine, the operator of the sunken ferry, arrives at the prosecutor's office in the western port city of Incheon as part of its widening investigations into the disaster . But . they must fight strong currents swirling around the ferry and, once . inside, overturned furniture, mattresses and other debris floating in . the murky, sediment-heavy waters. President . Park Geun-hye’s apology, and the earlier resignation of her prime . minister, comes amid rising indignation over claims by the victims' relatives that the government did not do enough to rescue or protect . their loved ones. She said . at a cabinet meeting at the presidential Blue House that South Korea has . 'lost many precious lives because of the accident and I am sorry to the . public and am heavy-hearted'. She says the government could not prevent the accident and 'the initial response and remedy were insufficient'. Humble: President Park bows before the memorial altar (left) then consoles a relative (right) of one of the victims of the sunken ferry . In mourning: Relatives of a passenger of the sunken ferry Sewol weep as they pay tribute to victims at Ansan city's official memorial altar at the Hwarang Recreation Park . In their memory: A funeral service employee sets up a portrait of a victim on the group memorial altar . Ms Park had earlier visited a memorial . set up in Ansan, the city near Seoul where the high school students are . from to pay her respects to victims. Wearing a black dress and white gloves, she laid flowers at an altar and bowed her head. According to local media, some angry family members of victims shouted at her and demanded an apology. She listened to them for 10 minutes before leaving. Investigators, . meanwhile, are expanding their probe into both the cause of the ship's . sinking and the initial response by emergency workers. Heartache and anger: The memorial comes amid rising indignation over claims by the victims' relatives that the government did not do enough to rescue or protect their loved ones . Grief: South Korean nuns pay a tribute at a group memorial altar as the government raised the death toll from the ferry disaster to 193 . Emotions running high: According to local media, some angry family members of victims shouted at the South Korean President and demanded an apology when she visited the memorial . Officials have searched the two service centres that deal with vessel traffic and that communicated with a crew member on the ferry during the sinking, seized documents and recordings from a coast guard office in Mokpo. They have also continued questioning the captain, the third mate and the helmsman who were on the bridge when the ship began listing. Only 174 people survived the sinking, including 22 of the 29 crew members. The government is making initial plans to eventually salvage the ferry, but has indicated it will not do so until search efforts end. Sombre: Mourners carry portraits of victims of the sunken ferry Sewol as divers fought strong currents in their search for more than 100 passengers still missing nearly two weeks after the disaster . Sad: Children wait to pay tribute to the victims of the ferry, most of whom were high school pupils . Paying tribute: Senior prosecutor Yang Jung-jin said that the cause of the sinking could be due to excessive veering, improper stowage of cargo, modifications made to the ship and tidal influence . All 15 crew members responsible for the ship’s navigation have been arrested, but they have not been formally charged yet because investigations are still going on. The arrested crew members are accused of negligence and of failing to help passengers in need. Captain Lee Joon-seok initially told passengers to stay in their rooms and took half an hour to issue an evacuation order, by which time the ship was tilting too severely for many people to get out. He told reporters after his arrest that he withheld the evacuation order because rescuers had yet to arrive and he feared for passengers’ safety in the cold, swift water. huge loss of life: Only 174 people survived the sinking, including 22 of the 29 crew members . Praying for the dead: South Koreans gather to bow in memory of the victims and missing passengers aboard the sunken ferry boat Sewol, while demanding the government take responsibility for the disaster . The ferry was carrying an estimated 3,608 tons of cargo, according to an executive of the company that loaded it. That far exceeds what the captain claimed in paperwork - 150 cars and 657 tons of other cargo, according to the coastguard - and is more than three times what an inspector who examined the vessel during a redesign last year said it could safely carry. Senior prosecutor Yang Jung-jin said that the cause of the sinking could be due to excessive veering, improper stowage of cargo, modifications made to the ship and tidal influence. Mourners bow in memory of the victims in Seoul as prosecutors widen their investigation in the disaster .
search for more than 100 passengers still missing 'Heavy-hearted': South Korean President Park House that South Korea has . 'lost many precious lives because of the accident and I am sorry to high school students are . from to pay her government raised the death toll from the ferry disaster to 193 . Emotions running high: and recordings from a coast guard office in victims of the sunken ferry Sewol as divers pay tribute to the victims of the ferry, most of