Police shot bikers with their rifles in the deadly shootout that killed nine people at a Texas restaurant earlier this year, a report has confirmed.

The acknowledgement comes for the first time in a 724-page incident report that was included in more than 8,800 pages of evidence.

The evidence includes video footage of people fleeing the scene while shots ring out, and audio of police threatening to shoot people who rise from the ground.

It still is not clear whose bullets caused all the deaths.

At least 20 people were injured when the shootout erupted as several biker gangs gathered at the Twin Peaks restaurant in Waco on May 17.

Police Chief Brent Stroman said in June that three officers fired a total of 12 shots, but declined to say whether they struck anyone.