ANKARA, Turkey (AP) — A gunman opened fire near Istanbul’s Blue Mosque on Wednesday, wounding two people in the heart of Istanbul’s tourist center, a witness told a news agency.

The witness told Turkey’s Dogan news agency says he helped carry two injured people into ambulances after the attack.

State-run TRT television says the motive of the attack was not clear and that the gunman reportedly fired randomly.

It was not clear if the gunman was captured, but police reinforced security at the site, state-run TRT television said.

The area is home to former Byzantine church of Haghia Sophia as well as the Ottoman palace of Topkapi.