Assailants have carried out arson attacks on four separate mosques in Istanbul, Turkish media reported on Tuesday.
According to a report on HaberTurk television, no one was wounded in the attacks, and damage to the mosques was minimal.
Mustafa Cagrici, the mufti or chief cleric for Istanbul, confirmed Tuesday that fires had broken out in four mosques. He would not say if they had been caused by arson.
Last year, police arrested a mentally unstable man for a series of arson attacks on mosques in Istanbul.