DENVER - Four people were stabbed in the parking lot of Sports Authority Field at Mile High following the Broncos' loss to the Chargers on Thursday night.
One person was in critical condition, Denver police said.
Multiple eye-witnesses reported seeing fights.
Denver police have multiple parties in custody, according to the department's Twitter account.
The incident occurred at about 9:55 p.m., in the stadium's Lot F near the intersection of Dick Connor Avenue and Federal Boulevard.
"It was obviously a very chaotic scene and investigators have their work cut out for them," Denver Police spokesperson Steve Warneke said.
Car left behind after a stabbing at a Denver Broncos vs. San Diego Chargers game.
Three victims, all men, remained in the hospital. The victims were transported to area hospitals. Their exact conditions were not released by police.
"They are conscious and talking," Warneke said.
Police believe there is a fourth victim they have not been able to locate.
Police said they do not know whether the fights were related to the game. And they have no descriptions of the victims or any suspects.
"There were witnesses and we've transported them to police facilities to be interviewed," Warneke said.
Officials for the stadium released a statement late Thursday:
"Stadium Management Company is aware of an incident that occurred in a parking lot adjacent to Sports Authority Field at Mile High. We are currently working with authorities to gather more information."
The Broncos declined comment Thursday night.
The game -- won by the Chargers 27-20 -- finished about 9:25 p.m. And the apparent fights broke out on the west side of the stadium in a parking lot.
It was the second Broncos game this season that was followed by a violent incident. A man died after an altercation in Kansas City on Dec. 1 after the Broncos beat the Chiefs.