People leave flowers for the victims outside a a nightclub which was attacked by a gunman overnight, in Istanbul, on New Year's Day, Sunday, Jan. 1, 2017. (AP)

Turkish anti riot police officers patrol near the Reina night club, one of Istanbul's most exclusive party spots, early on January 1, 2017. (AFP)

A man waits to leave a flower for the victims outside a nightclub which was attacked by a gunman overnight, in Istanbul, on New Year's Day, Sunday, Jan. 1, 2017. (AP)

People take their belongings out of the Reina night club, one of Istanbul's most exclusive party spots, early on January 1, 2017. (AFP)

People leave flowers for the victims outside a nightclub which was attacked by a gunman overnight, in Istanbul, on New Year's Day, Sunday, Jan. 1, 2017. (AP)

Women who survived an attack by a gunman, react outisde the Reina nightclub by the Bosphorus, in Istanbul, Turkey, January 1, 2017. (Reuters)

Family members of victims of an attack on a crowded Istanbul nightclub mourn outside the morgue in Istanbul, Sunday, Jan. 1, 2017. (AP)

Family members and friends attend funeral prayers for Ayhan Akin, one of the nightclub victims, in Istanbul, Sunday, Jan. 1, 2017. (AP)

Family members and friends carry the coffin after funeral prayers for Ayhan Akin, one of the nightclub victims, in Istanbul, Sunday, Jan. 1, 2017. (AP)

Family members and friends mourn as they attend funeral prayers for Ayhan Akin, one of the nightclub victims, in Istanbul, Sunday, Jan. 1, 2017. (AP)