Kansas City Chiefs American football player Jovan Belcher has killed himself outside the team's main stadium.
Police said the 25-year-old first-team linebacker shot his girlfriend dead a few miles away, before driving to a training facility at Arrowhead Stadium.
He then shot himself in the car park in front of team officials.
The club confirmed the incident in a statement, adding: "We are co-operating with authorities in their investigation."
Kansas City police spokesman Darin Snapp told AP news agency that authorities were told early on Saturday that a woman had been shot five miles away from the Arrowhead complex.
The victim was later identified as Belcher's girlfriend.
Police were then called to the training facility, where they saw the player in a car holding a handgun to his head, talking to two Chiefs officials.
They then heard a gunshot.