Turkey's state news agency Anatolia says three people have been injured in an explosion at a university in Istanbul.
Anatolia said the blast occurred in a toilet at the Istanbul University on May 8.
The three were hospitalized with slight injuries.
Anatolia says the cause of the blast is not clear.
Kurdish, leftist and radical Islamic militants have carried out bomb attacks in Istanbul in the past.
But it is not clear whether the blast was an act of terrorism.
Based on reporting by AFP and AP