At least nine people have been shot dead outside a bar in Ohio, just hours after 20 people were killed in a shooting at a Walmart in Texas.
A police spokesperson said at least 16 people had been taken to hospital following the Ohio incident.
The suspected gunman is also dead.
According to a further police statement, the shooting began at 1am local time (6am BST) in the city’s Oregon District, which is home to a number of bars and restaurants.
It added: “We had officers in the immediate vicinity when this shooting began and were able to respond and put an end to it quickly.
The FBI is also involved in the “large scene and investigation”. A family centre has been set up at the Dayton Convention Center.
Pictures of the scene captured by witnesses outside Ned Peppers Bar in the neighbourhood showed a police cordon surrounding the area.
One witness, James Williams, who said he was sitting outside the bar at the time of the incident, recalled a man carrying a rifle approaching the area before opening fire.
He said on Facebook: “The active shooter he tried to go into the bar but did not make it through the door someone took the gun from him and he got shot and is dead.
“A bunch of people was taken to hospital I don’t know how many this place is a disaster.”
In a further video to Facebook, Mr Williams added: “It’s awful. I’ve never seen anything like this.”
Another witness, Dougie Doug, broadcast live video to Facebook of the scene, and said: “There are dead people on the road everywhere.”
He added: “I heard the s***…there were at least 40 or 50 shots.”
Dayton Police Department advised people in a tweet to avoid the Oregon District area of the city as the investigation unfolds.
Source: SKY NEWS