Thirty-two seconds was all it took for a 24-year-old man to unleash a fatal volley of bullets killing 9 and wounding 26 others on a street in a popular night-life spot in Dayton, Ohio.

Armed with a .223 calibre rifle and 100-round drum magazine, the gunman fired his first shot at 1.05am on Sunday, in an alley by the Blind Bob’s pub.

His last, came at 1.06am, as he himself was shot down on 5th Street by at least three officers responding to the shooting.

Dayton police have released footage of these fatal last 30 seconds in the life of the gunman.

In the CCTV footage people can be seen racing down the street, with a number choosing to flee into a nearby bar amidst the racket of gunfire.

Ohio shooting: Gunman kills nine after opening fire outside bar Show all 21 1 /21 Ohio shooting: Gunman kills nine after opening fire outside bar Ohio shooting: Gunman kills nine after opening fire outside bar Several officers (top left and right) firing at Connor Betts (bottom left), who they identified as the gunman, seconds after he began killing people outside a bar in Dayton, Ohio Dayton Police Department/EPA Ohio shooting: Gunman kills nine after opening fire outside bar Betts killed nine people including his sister, and injured 26 others. He was also shot dead at the scene by the responding officers Dayton Police Department/AP Ohio shooting: Gunman kills nine after opening fire outside bar The Anderson Manufacturing AM-15 rifle with a 100-round double drum magazine which Connor Betts used Dayton Police Department/EPA Ohio shooting: Gunman kills nine after opening fire outside bar Surveillance footage of people beginning to flee from the sound of gunshots fired by Connor Betts Dayton Police Department/EPA Ohio shooting: Gunman kills nine after opening fire outside bar Police officers move towards Connor Betts Dayton Police Department/EPA Ohio shooting: Gunman kills nine after opening fire outside bar The vehicle which Connor Betts traveled to the scene in Dayton Police Department/EPA Ohio shooting: Gunman kills nine after opening fire outside bar Bodies are removed from the scene of a mass shooting in Dayton AP Ohio shooting: Gunman kills nine after opening fire outside bar The city's mayor, Nan Whaley, said the shooter was wearing body armour and used a ".223 high-capacity" gun during the assault. “In less than one minute, Dayton first responders neutralized the shooter.” AP Ohio shooting: Gunman kills nine after opening fire outside bar The FBI is assisting with the investigation Derek Myers/AFP/Getty Ohio shooting: Gunman kills nine after opening fire outside bar It was the second mass shooting in the US in less than 24 hours AP Ohio shooting: Gunman kills nine after opening fire outside bar Witnesses comfort one another at the scene AP Ohio shooting: Gunman kills nine after opening fire outside bar Police tape drapes over a chair near a pile of shoes. The shooting took place in the popular bar and nightlife area, Oregon district Dayton Daily News via AP Ohio shooting: Gunman kills nine after opening fire outside bar Dayton police look for evidence Dayton Daily News via AP Ohio shooting: Gunman kills nine after opening fire outside bar Shoes piled outside the scene AP Ohio shooting: Gunman kills nine after opening fire outside bar Residents comfort each other as they await word on whether they know any of the victims AP Ohio shooting: Gunman kills nine after opening fire outside bar Authorities retrieve evidence markers AP Ohio shooting: Gunman kills nine after opening fire outside bar Evidence markers lay on the ground near a hotdog stand Reuters Ohio shooting: Gunman kills nine after opening fire outside bar Evidence markers rest on the ground after a mass shooting in Dayton, Ohio, U.S. August 4, 2019. REUTERS/Bryan Woolston BRYAN WOOLSTON Reuters Ohio shooting: Gunman kills nine after opening fire outside bar People fill the streets during a vigil EPA Ohio shooting: Gunman kills nine after opening fire outside bar Mourners gather to recognise the victims Getty Ohio shooting: Gunman kills nine after opening fire outside bar Mourners leave flowers and candles at the entrance of Ned Peppers bar Getty

The gunman, who police named as Connor Betts, then runs into view dressed in a bullet-proof vest and mask.

He appears to be aiming for the Ned Peppers bar, where dozens had fled in search of safety just moments before.

But he is met with gunfire from the opposite direction, as officers on patrol rush to put an end to the mass shooting.

The surveillance footage released by the police shows the moment he is shot and falls to the ground.

Additional CCTV footage, which offers a different view of the crime scene, shows one of the officers firing at someone just out of the camera’s view.

“The threat was neutralised within approximately 30 seconds of the suspect firing his first shots,” said police in a media briefing released in the hours after the mass shooting.

Police chief Richard Biehl said if the gunman had not been stopped before he got inside the bar, the result would have been “catastrophic”.

Already, the toll is high, with 9 killed – the youngest 22-year-old Megan Betts, the sister of the shooter. The oldest was Derrick Fudge, 57.

Police said Betts, 24, his sister and another companion had arrived in a grey Toyota Corolla with a third person earlier in the evening, but had gone their separate ways.

Betts had little on his criminal record beyond a number of traffic violations.

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Police have not given any indication of a possible motive for the attack, but told reporters the gun had been bought legally online from Texas and shipped to a local arms dealer.

The mass shooting was the second to rock the US in a matter of hours. Earlier on Saturday morning another gunman had opened fire at a Walmart in El Paso, Texas.