Colombian Vice President Francisco Santos Calderón blamed the guerrilla group FARC, saying that there was "not the slightest doubt" that they were responsible and that the government had enough evidence of its involvement. Colombian authorities and investigators, with the aid of ATF members from the U.S., inspected the scene and the remains of the car bomb. Colombian prosecutors linked FARC to the bombing through the participation of, among others, John Freddy Arellan, a squash instructor who died in the bombing.