Credit to NBC News

Fort Worth police are investigating after they say a man died of a "self-inflicted injury" following a verbal altercation in the infield during a NASCAR race at Texas Motor Speedway.

Police spokesman Cpl. Tracey Knight says the man was believed to be around 40, but didn't identify him.

The death happened near or at the end of the Sprint Cup race Saturday night.

Knight didn't specify how the man died, or his relationship with others involved in the altercation. Knight said several people witnessed the altercation but that nobody else was in danger.