Nine people have been killed and at least 26 injured in a mass shooting in Dayton, Ohio – the second US mass shooting in 24 hours.
Mayor Nan Whaley said the injured were in several hospitals throughout the city.
The shooting began at 01:07 local time (05:07 GMT) in the Oregon district of the city centre.
Police confirmed they killed the gunman at the scene within a minute of him opening fire.
Mayor Nan Whaley told reporters she was “amazed” by the quick response of the officers which she said prevented further deaths, but also stressed it would be a “very, very difficult time” for families of victims.
“As a mayor, this is a day that we all dread happening,” she said. “What’s very sad is I’ve got messages from mayors across the country – it’s sad that we’ve all gone through it.”
The incident came only hours after a mass shooting in El Paso, Texas which left at least 20 people dead.
It also took place less than a week after three people were killed and 15 injured at a food festival in California.
Mayor Whaley called on anyone with information to call the police to aid their investigation.
Assistant Police Chief Matt Carper had earlier told reporters that officers on patrol managed to take down the gunman.
“Our people are very well trained for a situation like this,” he said, adding it was “very fortunate that the officers were in close proximity”.
Footage posted on social media showed people running as dozens of gunshots echoed through the streets.
It is thought the shooting took place outside Ned Peppers Bar on E 5th Street. A note saying staff members were safe appeared on Ned Peppers Instagram page and on the nearby Hole in the Wall bar’s Facebook page.
Nothing is yet known about the gunman.
At a news conference, Mayor Nan Whaley said she was wearing body armour and was carrying extra magazines for his weapon.
“We don’t know the thoughts of the shooter,” she said.
Officer Carper, who stood beside Mayor Whaley, said it was “very early in the investigative stages” and could not confirm there was only one gunman involved, but said so far that looked likely.
Emergency services gathered at the corner of E 5th Street and Wayne Avenue in the wake of the shooting.
FBI agents are also assisting police with their investigation.
At the news conference Mayor Whaley said Sunday would be “a day filed with prayer for our citizens”, and asked people to think of those people “who went downtown on a Saturday night and thought they’d be safe”.
She earlier tweeted that she was “heartbroken” after the shooting, and thanked first responders.