The UFC has confirmed the death of their flyweight fighter Allan Nascimento in their latest Instagram post, while also penning a touching tribute to the deceased Brazilian. The caption read:This morning, Monday, August 3rd, our beloved flyweight fighter, Allan Nascimento, was found unresponsive after suffering an apparent heart attack in his sleep. Check out UFC’s post about Allan Nascimento below:Nascimento had just fought on June 20, 2026, at UFC Fight Night: Kape vs. Horiguchi 2. Dustin Poirier and Mackenzie Dern React to the death of UFC Flyweight Allan NascimentoA boatload of comments have been flooding the UFC comments section following their post announcing Allan Nascimento’s death. Check out their reactions below:Mackenzie Dern and Dustin Poirier react to the death of Brazilian flyweight Allan Nascimento (via UFC/IG)Rest in peace, Allan Nascimento, and condolences to his loved ones.