The Lebanese security sources regarding the abduction of Turkish pilots in Beirut, said the investigation to enlighten the incident revolved around how the abduction was conducted as the kidnappers were thought to be professionals. The sources conveyed their opinions about phone records of suspects and said, suspects did not make phone calls from a specific place which indicated that the pilots were abducted by a professional group. The Lebanese security forces have been chasing people who abducted Turkish pilots, the sources noted. The sources also said, vital information was received from 5 detainees after their interrogation. Unidentified gunmen abducted Turkish pilot Murat Akpinar and his co-pilot Murat Agca in Beirut last week. A group named "Visitors of Imam Reza" had claimed responsibility for abduction of the two Turkish pilots.