An ambulance helicopter takes off from the blast scene where two officers and one civilian were killed when a car bomb exploded outside a police station near Turkey's southeastern city of Diyarbakir, Turkey August 15, 2016. REUTERS/Ihlas News Agency via REUTERS TURKEY OUT ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NO RESALES. NO ARCHIVE. TURKEY OUT. NO COMMERCIAL OR EDITORIAL SALES IN TURKEY.