Emergency personnel and police respond to a reported active shooter situation near Fountain Square, Thursday, Sept. 6, 2018, in downtown Cincinnati.

Police say four people are dead, including the gunman, in a downtown Cincinnati bank shooting.

Police Chief Eliot Isaac said the shooter opened fire early Thursday morning at the loading dock of the Fifth Third Bank building. Isaac said the gunman then entered the bank's lobby where he exchanged gunfire with police.

It's unclear if the gunman shot himself or was shot by officers.

One of the victims also died at the scene.

Cincinnati Mayor John Cranley said the gunman was "actively shooting innocent victims" and that it was a "horrific" scene. He noted the building on the city's Fountain Square houses popular ice cream, sandwich and pastry shops.