Ohio shooting: Nine killed by gunman in Dayton, Ohio

At least nine people are dead and 16 reportedly injured after a gunman opened fire in the US state of Ohio, mere hours after 20 people were killed in a mass shooting in El Paso, Texas.

The shooting started around 1am on Sunday (local time) outside Ned Peppers Bar in Dayton's Oregon District neighbourhood.

Dayton Police Department confirmed the gunman was killed after officers returned gunfire.

At least sixteen people wounded in the shooting have been hospitalised. The extent of their injuries is so far unknown.

"We had officers in the immediate vicinity when this shooting began and were able to respond and put an end to it quickly," Dayton Police Department posted on Twitter.

US reporter Derek Myers claims the alleged gunman was "a heavy set white male". 

"The suspect was firing a long gun with multiple rounds at the victims," an officer says to CBS News.

Reports claim there may be a possible second suspect.

Dayton Police Department says they are in the process of establishing a family assistance centre and urges any witnesses to come forward.

The FBI is now on the scene assisting with the investigation.

Last week a gunman shot three people dead at a garlic festival in Gilroy, California.