Officials say armed attackers in southeast Turkey have killed a director of an aid organization linked to a Kurdish Islamist party, triggering rioting that led to the death of another person.

The governor's office says a policeman and two journalists were injured in Tuesday's incident in the city of Diyarbakir.

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.

Relations between the supporters of the two Kurdish groups — the Islamist Huda Par and the People's Democratic Party — are tense.

However, the People's Democratic Party strongly condemned the attack, suggesting it was an act of provocation aiming to fuel further enmity between the groups.