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A gamer has shot dead two people at a tournament in Jacksonville, Florida, police say.

Unconfirmed reports suggest he was angry after losing at the American football eSports event.

Police named the killer as David Katz, 24, who then took his own life.

The shooting happened at a Madden NFL 19 event, which was also live streamed on video platform Twitch.

(Image: Taylor Poindexter speaks to reporters after witnessing a gunman open fire on gamers at a tournament in Jacksonville, Florida, USA. Credit: Reuters/Joey Roulette).