An active shooter situation has been reported outside the Ned Peppers Bar in Dayton, Ohio, with local police confirming that 10 people were killed, including the gunman.
Law enforcement is actively investigating the shooting, while the FBI is assisting in the probe.
Who's the Suspect?
The gunman, who has yet to be identified, was neutralised by police, who are currently searching the area for a suspected second shooter.
According to multiple posts on social media, at least one perpetrator was a masked white male in all black, armed with a rifle, with one user tweeting that he still may be on the run.
Police have yet to confirm or deny these claims.
How Many Killed?
The Dayton police have confirmed that the death toll rose to 9. Earlier, WHIO-TV reported that at least 7 seven people were shot dead, Dayton Daily News cited unnamed sources as saying that at least 10 people are dead, and an unknown number wounded.
The Ned Peppers Bar, meanwhile, has shared an Instagram post to say that its staff is safe.
The police are checking the bars in the Oregon District for any additional victims, while medics have alerted local hospitals that several patients with gunshots would be arriving.
Second Mass Shooting in Less Than 24 Hours
The massacre in Dayton was the second mass shooting in the US in one day, following the violence at a Walmart store in the Cielo Vista shopping mall in El Paso, Texas, where a gunman murdered 20 people and wounded 26 others.
The white male suspect, identified as 21-year-old Patrick Crusius, reportedly posted a manifesto ahead of the shooting spree, declaring that his act was motivated by his fear of increasingly large numbers in the Hispanic population due to illegal immigration. The authenticity of the manifesto is yet to be confirmed.