A large explosion has been reported near a riot police headquarters in the Turkish city of Diyarbakir.
Ambulance and police have been sent to the scene of the blast in the mainly Kurdish city’s Baglar district, the private DHA news agency said.
Several people are thought to be wounded, with the cause of the explosion not clear at this stage.
The explosion comes days before a referendum on broadening President Recep Tayyip Erodgan’s powers.
Turkey has suffered a number of bomb attacks carried out by Kurdish rebels or Islamic State militants in recent years.
Diyarbakir is the largest city in the southeast of Turkey, where Kurdistan Workers Party (PKK) militants have fought an insurgency against the state for more than three decades in a bid for autonomy.