Four people were killed Tuesday, including the leader of an Islamist charity, in clashes between rival Kurdish groups in Diyarbakir, adding to tensions in Turkey's largest Kurdish-populated city days after legislative elections.

Aytac Baran, the leader of the Ihya-Der group, was shot dead by unknown gunmen outside his office in Diyarbakir, prompting a gunfight that left three others dead and four injured, including three journalists, hospital sources told AFP.