CINCINNATI (AP) — 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.

He says it “could have been much, much worse” if not for the immediate police response to end the threat.

U.S. Senator Rob Portman (R-OH) released a statement about the shooting on Thursday morning.

“Jane and I are heartbroken about today’s shooting in our hometown of Cincinnati. This is a tragic day for our city and our state,” he said. “While we are still learning about what happened and why, we thank all of our police officers and first responders for their bravery today, and for taking quick action to stop the suspect and provide medical care for those at the scene. We are praying for the victims, their families, and all those who’ve been impacted by today’s tragedy.”