More violence outside an NFL stadium. Denver's Sports Authority Field at Mile High was the location Thursday night, after the Broncos lost to the San Diego Chargers.

Denver police tweeted the news:

#BREAKING: DPD on scene of a quadruple stabbing at Sports Authority Field. 1 party in critical condition.

— Denver Police Dept (@DenverPolice) December 13, 2013

#BREAKING: Officers have parties in custody and are not currently looking for any other suspects at this time.

— Denver Police Dept (@DenverPolice) December 13, 2013
The Denver Post reported that multiple eyewitnesses saw fights taking place.

"It was obviously a very chaotic scene and investigators have their work cut out for them," Denver Police spokesperson Steve Warneke told The Post.

The stabbings are the latest in a series of recent incidents involving football fans.

Earlier this month in Kansas City, Mo., Kyle Van Winkle died after an altercation in the Arrowhead Stadium parking lot during Kansas City's game against Denver.

In September in San Francisco, a teenage fan suffered a concussion and a broken arm and nose at Candlestick Park after police say he was attacked during the 49ers' game against Indianapolis.

The Associated Press contributed to this report.
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