Allan Nascimento: UFC fighter dies aged 34 after suffering apparent heart attack in his sleep

The Brazilian flyweight was found unresponsive on Monday after suffering an apparent heart attack in his sleep.

A UFC statement said: "This morning, Monday, August 3, our beloved fighter and exemplary flyweight Allan Nascimento was found unresponsive after suffering an apparent heart attack in his sleep.

"Despite the efforts of the responding medical team, he was pronounced deceased at the scene.

"Our thoughts and deepest condolences are with Allan's family, friends, team-mates, and loved ones during this incredibly difficult time."

Nascimento, who had won 22 of his 29 bouts, last fought in June, when he lost to Mitch Raposo in Las Vegas on a split decision.