Kansas City Police Chief Darryl Forte announced that a death that occurred in the parking lot of Arrowhead Stadium, home of the Kansas City Chiefs, is being investigated.

There is no official update from police at this time, but KCTV reports that a man and his son returned to their Jeep in Parking Lot A during the game against the Denver Broncos on Sunday to find someone sitting in their SUV, “rifling through the vehicle.” A struggle then ensued between the two men.

As the man and the Jeep owner began to fight, the owner’s young son ran for help. The man found in the Jeep, described as in his mid 20s, collapsed onto the pavement during the fight and was rushed to an area hospital, where he was pronounced dead.

Police officers were called to the scene at 5:20, arresting three persons of interest.

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Kansas City police Officer Darrin Snapp said an autopsy will be vital in determining the cause of death since the man wasn’t stabbed or shot.

“The main thing we’re trying to figure out now is exactly how this person died. The hospital says there’s no obvious signs of how he passed away, so we’re still waiting on that. We’re going to investigate it as a homicide until we find out exactly how the person died,” Snapp said.

UPDATE: Homicide at Arrowhead Stadium not caused by fan rivalry http://t.co/J0y6MnSzML

— FOX 4 News (@fox4kc) December 2, 2013

“Everyone was very cooperative when we got here,” Snapp said. “Everyone that we believed was involved is still here and we’re talking to them. Right now they’re persons of interest. Like I said, until we find out exactly how this person passed away, we’re going to investigate it as a homicide. They’re not suspects right now until we find out exactly what happened.”

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