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UFC fighter Allan Nascimento dies after apparent heart attack

ByMason Leib ABCNews logo
Tuesday, August 4, 2026 3:50PM
ABC News Live
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Brazilian mixed martial artist and UFC flyweight Allan Nascimento has died after suffering an "apparent heart attack in his sleep," the promotion company announced on social media Monday.

Nascimento was 34 years old, and last fought at a UFC event in June.

Allan Nascimento of Brazil prepares to face Mitch Raposo in a flyweight fight during the UFC Fight Night event at Meta APEX on June 20, 2026 in Las Vegas, Nevada.
Allan Nascimento of Brazil prepares to face Mitch Raposo in a flyweight fight during the UFC Fight Night event at Meta APEX on June 20, 2026 in Las Vegas, Nevada.
Photo by Chris Unger/Zuffa LLC

This is a developing story. Please check back for updates.

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