By . Daily Mail Reporter . PUBLISHED: . 08:46 EST, 20 November 2013 . | . UPDATED: . 14:45 EST, 20 November 2013 . The U.S. Coast Guard is searching for two people who were aboard a small medical plane that crashed off the coast of Florida on Tuesday night, killing two others. The Learjet 35 plane had already dropped off its patient at a hospital near Fort Lauderdale and the two pilots, a doctor and a nurse were returning to Mexico when the aircraft's engine apparently failed. Pilots Jose Hiram Galvan de la O. and Josue Buendía Moreno and passengers Fernando Senties Nieto and Mariana Gonzalez Isunza were on the plane, Mexico's Transportation Department. Two bodies have been recovered but Mexican officials did not identify whom they belonged to. Shortly after takeoff at 7.51pm, the pilot had reported . engine failure to air traffic controllers and said they were going to head back to the airport to land. A few minutes later, in response to the tower's instructions, the pilot says, 'Mayday, mayday, mayday.' Scroll down for video . Wreckage: A Coast Guard image shows debris of a medical plane that crashed off the Florida coast on Tuesday night. Four people were on board and two bodies have been recovered . Tragedy: Two pilots, a doctor and nurse were on the plane. A video still shows rescuers carrying a body bag . But the aircraft went down at 8.20pm . about three miles northeast of Fort Lauderdale-Hollywood International . Airport, and ended up in waters about a mile offshore, Federal Aviation Administration . spokeswoman Kathleen Bergen said. Rescue workers were able to arrive at . the debris site in roughly 25 minutes and two bodies were found immediately. They are continuing to search for the other two people on board. Fort Lauderdale city spokesman Matt Little told NBC Miami that the bodies of one man and one woman were found near the debris. 'We still have a very active search . and rescue case going on this morning off the coast of Fort Lauderdale,' Coast Guard Lt. Commander Gabe Somma said at a new conference on . Wednesday. 'We continue at this hour to be fully engaged in a search and rescue effort.' Somma . said crews were searching a massive debris field of approximately 20 . square miles and said that 1,000 pounds of debris had been recovered. Destroyed: The cause of the crash is under investigation but the pilot had said the engine was failing . The doctor and nurse worked for . AirEvac International, according to a dispatcher for the air ambulance . and transportation company, while the pilots worked for the aircraft's . operator. AirEvac said . their focus is on the victims, who had just picked up a patient in Costa . Rica and dropped the patient off at a South Florida hospital. 'These are people that are dedicated to saving lives,' said Albert Carson, director of operations for AirEvac International. He . said the company had sent documents to the Mexican consulate to try to . identify the deceased, a process that continued Wednesday afternoon. Carson . promised there would be an investigation and said the company would be . 'transparent and open'. The company's main bases of operation are in . Mexico, Central America and South America and San Diego, California, . according to its website. Aircraft: The pilot of the Learjet 35 (file picture) said the engine was failing as he tried to get back to land . Search: U.S. Coast Chief Petty Officer Ryan Doss speaks outside of the U.S. Coast Guard station in Dania Beach, Florida. The Coast Guard said they will search for the 2 remaining victims until sunset . Federal Aviation Administration officials warned of potential problems found in the Learjet 35 in June. According to the special bulletin, maintenance workers found cracks in the control column on Learjet Model 35A (C-21A) airplanes. Five airplanes were inspected and all five had cracks in the area at the base of the column where it attaches to the floor. But the concern was not deemed dangerous enough to warrant a further directive, according to the bulletin. 'We will search until sunset. That's when we'll have to make a new game plan,' said Coast Guard Petty Officer Mark Barney. The National Transportation Safety Board is investigating. 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Two pilots, a doctor and a nurse were aboard the plane when it crashed off the coast of Fort Lauderdale at 8.20pm on Tuesday .
Team had already dropped off its patient and were returning to Mexico .
Search crews continue to look for the two other passengers .
By . Daily Mail Reporter . PUBLISHED: . 08:46 EST, 20 November 2013 . | . UPDATED: . 14:45 EST, 20 November 2013 . The U.S. Coast Guard is searching for two people who were aboard a small medical plane that crashed off the coast of Florida on Tuesday night, killing two others. The Learjet 35 plane had already dropped off its patient at a hospital near Fort Lauderdale and the two pilots, a doctor and a nurse were returning to Mexico when the aircraft's engine apparently failed. Pilots Jose Hiram Galvan de la O. and Josue Buendía Moreno and passengers Fernando Senties Nieto and Mariana Gonzalez Isunza were on the plane, Mexico's Transportation Department. Two bodies have been recovered but Mexican officials did not identify whom they belonged to. Shortly after takeoff at 7.51pm, the pilot had reported . engine failure to air traffic controllers and said they were going to head back to the airport to land. A few minutes later, in response to the tower's instructions, the pilot says, 'Mayday, mayday, mayday.' Scroll down for video . Wreckage: A Coast Guard image shows debris of a medical plane that crashed off the Florida coast on Tuesday night. Four people were on board and two bodies have been recovered . Tragedy: Two pilots, a doctor and nurse were on the plane. A video still shows rescuers carrying a body bag . But the aircraft went down at 8.20pm . about three miles northeast of Fort Lauderdale-Hollywood International . Airport, and ended up in waters about a mile offshore, Federal Aviation Administration . spokeswoman Kathleen Bergen said. Rescue workers were able to arrive at . the debris site in roughly 25 minutes and two bodies were found immediately. They are continuing to search for the other two people on board. Fort Lauderdale city spokesman Matt Little told NBC Miami that the bodies of one man and one woman were found near the debris. 'We still have a very active search . and rescue case going on this morning off the coast of Fort Lauderdale,' Coast Guard Lt. Commander Gabe Somma said at a new conference on . Wednesday. 'We continue at this hour to be fully engaged in a search and rescue effort.' Somma . said crews were searching a massive debris field of approximately 20 . square miles and said that 1,000 pounds of debris had been recovered. Destroyed: The cause of the crash is under investigation but the pilot had said the engine was failing . The doctor and nurse worked for . AirEvac International, according to a dispatcher for the air ambulance . and transportation company, while the pilots worked for the aircraft's . operator. AirEvac said . their focus is on the victims, who had just picked up a patient in Costa . Rica and dropped the patient off at a South Florida hospital. 'These are people that are dedicated to saving lives,' said Albert Carson, director of operations for AirEvac International. He . said the company had sent documents to the Mexican consulate to try to . identify the deceased, a process that continued Wednesday afternoon. Carson . promised there would be an investigation and said the company would be . 'transparent and open'. The company's main bases of operation are in . Mexico, Central America and South America and San Diego, California, . according to its website. Aircraft: The pilot of the Learjet 35 (file picture) said the engine was failing as he tried to get back to land . Search: U.S. Coast Chief Petty Officer Ryan Doss speaks outside of the U.S. Coast Guard station in Dania Beach, Florida. The Coast Guard said they will search for the 2 remaining victims until sunset . Federal Aviation Administration officials warned of potential problems found in the Learjet 35 in June. According to the special bulletin, maintenance workers found cracks in the control column on Learjet Model 35A (C-21A) airplanes. Five airplanes were inspected and all five had cracks in the area at the base of the column where it attaches to the floor. But the concern was not deemed dangerous enough to warrant a further directive, according to the bulletin. 'We will search until sunset. That's when we'll have to make a new game plan,' said Coast Guard Petty Officer Mark Barney. The National Transportation Safety Board is investigating. 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plane had already dropped off its patient at a a doctor and a nurse were returning to Mexico pilots, a doctor and nurse were on the plane. A this morning off the coast of Fort Lauderdale,'