According to Istanbul Governor Ali Yerlikaya, the blast occurred at around 4.20 p.m. local time, with police and emergency officials cordoning off the scene.
Turkish President Recep Tayyip Erdoğan said that according to the initial information, the explosion could be a suspected act of terrorism and a woman played a role in it. "It smells like terrorism," he told a news conference before leaving for a G20 summit in Bali, Indonesia.