A basketball match between members of the United States national team ended abruptly when a player suffered a horrific leg injury.
Indiana Pacers player Paul George landed awkwardly after contesting a ball in the final stages of the exhibition match, known as a "scrimmage", between Team USA on Friday in Nevada, Las Vegas.
The 24-year-old's lower leg appeared to snap as he crashed to the ground.
Footage of the incident was so graphic that commentators for broadcaster ESPN decided not to show the replay.
George's parents came down from the stands to comfort their son as he received treatment.
His team-mates were visibly distressed by the injury, and the match was abandoned with just under 10 minutes to play.
Fellow player Kyrie Irving was reportedly seen crying in his father's arms as the seriousness of George's injury became clear.
“With the serious injury that we had … and out of respect to Paul and his family, the scrimmage is done, and we want to thank you for your support,” USA Basketball head coach Mike Krzyzewski told the crowd.
The full extent of his injury is yet to be revealed.
Team USA players refused to speak to the media after the game, but the world of basketball immediately reacted to news of George's injury on Twitter.
NBA Commissioner Adam Silver later said in a statement: "It was difficult to watch the injury that Paul George sustained tonight while representing his country. The thoughts and prayers of all of us at the NBA are with Paul and his family."
LeBron James was among the players to express their sympathies for George.
Despite some suggestions he could miss all of next season, George was upbeat in his first tweet since the incident, vowing to return "better than ever".
Paul George is said to be one of the highest-rated players in the NBA, and was regarded as an increasingly important figure in the national team set-up.
He was considered a certainty for a place in the FIBA World Cup which begins later this month in Spain.
Team USA are aiming to become only the third team to win back-to-back world titles.