Active shooter in downtown Cincinnati

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

Cincinnati police respond to shooting inside a bank, in this social media photo released in OH, U.S. on September 6, 2018.

A gunman carrying enough ammunition to cause "a bloodbath beyond imagination" killed three people and wounded two others Thursday morning at a high-rise office building in the heart of Cincinnati before dying in a hail of police gunfire.

"I was walking past the Chipotle and I had my headphones in when some woman stopped me and said 'You don't want to go to the square, we just heard gun shots, ' " he says.

Cincinnati Police Chief Eliot Isaac says two other victims were injured.

"He was actively shooting innocent victims, it appears, and our officers were able to kill him and stop the threat very quickly", Cincinnati Mayor John Cranley told a news conference.

Bank manager Greg Harshfield, who on the 29th floor of the building when the shooting began, said that he heard multiple shots and saw police arrive nearly immediately.

Almost three hours after the incident, several streets in downtown Cincinnati remained closed to traffic.

Around 11 a.m., the department said three people plus the suspect were dead.

"All he had to do was look over the counter at us and we would have been shot", Ginyard told reporters, adding she saw the shooter reload his pistol. One of the injured is in serious condition, while the other is in critical condition. Perez is not believed to have had any affiliation with Fifth Third Bank and a motive for the mass shooting has yet to be determined. He noted that it "could have been much, much worse" if not for the quick police response to the shooting.

'She walked in the door and he shot her, ' the witness told Cincinnati newspaper The Enquirer.

The scene was announced as secure at around 9:15 a.m. ET, but there were multiple victims; one was found in the area of 511 Walnut Street, which is adjacent to the city's Fountain Square. "I can't put into words how grief-stricken we are", Cotter said. "After that I started running".

Newcomer was a superintendent at Gilbane Building Company and working Thursday at the Fifth Third Center, Gilbane spokesman Wes Cotter said.

Eric Kearney, president of the Greater Cincinnati and Northern Kentucky African American Chamber of Commerce, was in a board meeting across the street from the bank. Pacific time but police said they are still investigating. We knew immediately something was wrong. "We're a bit rattled".

The building is located in Fountain Square, a hub for entertainment and dining in the city.

The chief said some of the victims were shot multiple times. It is home to retail stores, business officers, hotels and eateries.

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