At least five people were severely wounded on Tuesday in an apparent suicide bombing that targeted a police station in central Istanbul, Turkish NTV television reported.
The alleged suicide bomber came running towards the police station in the central Sultangazi neighbourhood and blew himself up at the entrance, partially caving in the front door and the ceiling, according to witnesses.
The rubble crushed several people, including policemen, inside the building. The wounded were immediately taken to nearby hospitals and the toll is likely to rise, NTV reported.
There was no immediate claim of responsibility for the attack.