Turkish media are reporting that an explosion in Istanbul’s main square has injured some 15 people.
The private Dogan news agency reported the figure and said the explosion occurred Sunday close to a spot where riot police were stationed in case of demonstrations.
NVT television said the explosion may have been caused by a suicide bomber.
Witness Veysel Surmeli told CNN-Turk television that police cordoned off the area. Ambulances had arrived on the scene and medics were attending some of the injured.