9 killed in Dayton, Ohio, mass shooting hours after gun massacre in Texas

Unconfirmed video posted on a Twitter page for the Oregon District showed bodies covered with sheets lying on the sidewalk

Nine people were killed in a mass shooting early on Sunday in Dayton, Ohio, police said, adding that the assailant was shot dead by responding officers.

The incident occurred shortly after 1:00 am in the popular bar and nightlife Oregon district of the city, Police Lieutenant Colonel Matt Carper said.

"We had one shooter that we are aware of and multiple victims," he told reporters.

"The shooter is deceased, from gunshot wounds from the responding officers," he said, adding no police were injured.

"We have nine victims deceased ... and we have approximately 16 more victims hospitalized right now in unknown conditions," he added.