Armed persons in southeast Turkey killed the head of an aid organization linked to a Kurdish Islamist party on Tuesday, triggering rioting that led to the death of two other people, officials said.

A policeman and two journalists covering the incident in the city of Diyarbakir were injured, according to the regional governor's office. It didn't provide any more information about those killed.

The motive for the attack was not known. It comes two days after a pro-Kurdish party made a strong showing in Turkey's parliamentary election.