Official claim of responsibility. The passengers at istanbuls airport scrambled terrified as three gunmen attacked the airport. Two were they National Terminal and the 3rd in a parking lot. The preliminary findings suggest all three opened fire before detonating explosive vests. Video from inside the terminal shows people fleeing bright flashes and in one clip, a gunman is apparently shot by Security Officer and drops to the floor. A few seconds later, there is an explosion. Witnesses describe the sense of confusion and fear inside the airport. I tried to keep as calm as possible but you know there was a lot of people falling down on the grounds and not knowing what is going on. I just recognized the gunshots and heard this huge explosion and i knew immediately it was a bomb. And i just bolted as fast as i can. Multiple u. S. Officials say isis is suspected to behind the attack but there has not yet been a claim of responsibility. The terrorists have called for attacks in the holy mont