Omar Perez, 29, fatally shot three people and wounded two more shortly after 9 a.m. on Sept. 6, before he was killed during a brief gun battle with police officers,

Witnesses said Perez was wearing a business suit and carrying a briefcase when his rampage began.

Cincinnati Police Chief Eliot Isaac said the gunman used a 9mm handgun and was carrying hundreds of additional rounds of ammunition.

Chief Isaac said Perez entered the building in the center of downtown through the loading dock and began shooting right away, the Cincinnati Enquirer reported.

“He proceeded to the lobby, where several of our officers engaged him,” the chief said. “There were gunshots exchanged.”

“It’s a very horrific situation,” he said.

Chief Isaac said all of the shooting took place in the lobby of the building which is home to Fifth Third Bank’s corporate headquarters.