The identity of the gunman who killed 39 people in an attack on an Istanbul nightclub on New Year's Day has been established, Foreign Minister Mevlut Cavusoglu said in a televised interview. No name was announced yet. Turkey detained more five in connection with Istanbul nightclub terror attack that left 39 people dead and dozens wounded. That would bring the number held in connection with the investigation to at least 21, and Turkish authorities still are believed to be on the hunt for the gunman who carried out the attack at the Reina nightclub. Details of where the latest detentions took place were not immediately available. The gunman, who fled after the attack, remains at large.