text: The director of a jail for juvenile gang members was gunned down in the streets by prisoners' fellow criminals as he made his way to work on Friday. Luis Andres Cuyun, 30, was riding in a car when two suspected Mara Salvatrucha members opened fired on him and his driver, who was injured in the attack. A Salvadoran man arrested for alleged involvement in the shooting later told authorities that he had come to the country specifically to kill Cuyun as 'revenge' for treatment of gang members at the director's  center in Guatemala City. WARNING GRAPHIC IMAGES BELOW . Luis Andres Cuyun, 30, the director of a jail for young gang members in Guatemala City, was killed as he went to work on Friday morning . The director and his companion, social welfare official Abimael Rodas Palacios, were riding in their pickup truck when suspected Mara Salvatrucha gang members opened fire . Cuyun had been riding to work before the sudden attack on Friday morning in Guatemala City, the nation's capital and largest city . Salvadoran Juan Carlos Medina Luna, 29, and Guatemalan Mario Alfonso Aguilar, 18, were arrested after a short police chase . Juan Carlos Medina Luna, 29, who entered the country from El Salvador two months ago, said he carried out the hit on the orders of a man named 'El Travieso' or 'The Naughty One' and did it 'because I like to kill'. Guatemalan Mario Alfonso Aguilar, 18, who is known as Marito, was also arrested for the attack on Friday after a police chase, according to Prensa Libre. Another suspect in the two men's car fled, police say. The incident reportedly stretched for several blocks after a gang truck pulled alongside Cuyun's pickup and began shooting. Cuyun and his companion Abimael Rodas Palacios were said to have gotten out of their car and began firing back at their attackers. Palacios, 42, a worker for the country's social welfare secretary, was taken to the hospital with bullet wounds in his leg and arm. Two AK-47s and two grenades were found inside Medina Luna and Aguilar's gray Mitsubishi van. Medina Luna said that the pair had been ordered to kill Cuyun by gang leader El Travieso, and said that he did the hit job because he enjoys killing . Medina Luna said that Cuyun had made his fellow gang members 'vomit blood' at Las Gaviotas. Above, the victims' car. Cuyun and Palacios were said to have gotten out of their car and fired back at their attackers before the jail director was gunned down and . Two AK-47s and two fragmentation grenades were found in the suspected attackers' Mitsubishi when they were arrested . Medina Luna said that Cuyun had made his fellow gang members 'vomit blood' at Las Gaviotas, which means 'The Seagulls' , according to Siglo 21. A children's advocate from the Guatemalan office of human rights inspected conditions at the facility in 2012 and found that they were acceptable, according to the country's human rights organization Institución del Procurador de los Derechos Humanos . Mara Salvatrucha, also known as MS-13. began among Salvadorans in Los Angeles in the 1980s, but became an international criminal gang as members were deported back to Central America. Governments in countries such as Guatemala, El Salvador and Honduras have struggled to control violence, including inter-gang attack between groups such as the Salvatruchas and a gang called Calle 18. In 2009 the FBI estimated that it had up to 50,000 members worldwide, including up to 10,000 in the US. MS-13 members have been involving in trafficking cocaine into the US, prostitution rings, robberies, assaults, murders and gun smuggling. Gang thugs sent back to Central America from time committing crimes in the US, who often decorate their bodies with elaborate tattoos, are seen as having special status in their home countries. They have used machetes in many of their attacks and often recruit minors. Unicef estimates that 50 killings per year in Guatemala are committed by juveniles. The gang members alleged abuses against their young fellows at Las Gaviotas (pictured, which means The Seagulls . Roughly 50 killings per year in Guatemala are committed by minors, many of whom are recruited by gangs such as Mara Salvatrucha. Above, inmates at Las Gaviotas attend class . Mara Salvatrucha often decorate their bodies with elaborate tattoos. Above, a former leader of the  gang poses during a photo session at Comayagua jail in Honduras in 2008 .
target: Luis Andres Cuyun, 30, who ran Las Gaviotas facility in Guatemala City, shot dead by attackers who later said they were ordered to do the hit .
  Cuyun and his social welfare official companion fired back at the attackers .
  Juan Carlos Medina Luna, 29, and Mario Alfonso Aguilar, 18, arrested .
  Gang said that its members were abused inside Cuyun's jail .