Possibly the police was the target of attack, because a bus carrying police drove past seconds before. It’s a common fact for security forces in the country to be attacked by Kurdish rebels fighting Turkey for autonomy. This time there was no immediate claim of responsibility. Istanbul Gov. Vasip Sahin said the explosion caused panic because it occurred on a busy section of the road into an industrial and residential area.The Istanbul municipality said that metro services were halted after the explosion. Large numbers of ambulances arrived to the scene, as commuters were helped to safety. CCTV captured live the moment of explosion (see the image attached to article). including around Bayrampasa.Turkey is currently on alert for attacks after 103 people were killed on October 10 when two suicide bombers ripped through a crowd of peace activists in the capital Ankara.