Turkish police officers carry the coffins of a comrade during a funeral ceremony at Istanbul's police headquarters on December 11, 2016 (AFP Photo)
Relatives of police officer Haşim Usta who was killed in PKK terrorist attacks on Dec. 10 mourn over his coffin during the funeral in Istanbul, Turkey, 12 December 2016 (EPA Photo)
Relatives mourn over the coffin of a Turkish police officer during a funeral ceremony at Istanbul's police headquarters on December 11, 2016 (AFP Photo)
A man lays flowers on a police vehicle as people pay their respects outside the Vodafone Arena football stadium in Istanbul on December 11, 2016 (AFP Photo)
People hold a giant Turkish national flag during a demonstration on December 11, 2016 a day after twin bombings near the home stadium of Besiktas football club. (AFP Photo)
PM Yıldırım, President Erdoğan, former President Gül and FM Mevlüt Çavuşoğlu attending the funeral ceremony for the victims of Istanbul terror attacks at Police Department headquarters (AFP Photo)