# Death of UFC flyweight Allan Nascimento > Live situation record from CLSTR: https://clstr.news/situations/brazilian-mma-fighter-death > Updated: 2026-08-11T03:08:12.000Z. Sources: 54. Developments: 3. Allan Nascimento, the 34‑year‑old UFC flyweight known as “Puro Osso,” was found unresponsive in his São Paulo home on 3 August 2026 and was pronounced dead at the scene after an apparent heart attack while he slept. The UFC confirmed the circumstances, expressing condolences to his family, friends, teammates, and fans. Nascimento, who joined the UFC in 2021, held a 22‑7 professional record and a 4-2 record within the organization. He trained at Chute Boxe under Diego Lima and was a close training partner of Charles Oliveira, who called him a “brother.” Nascimento’s death has had significant ripple effects within the sport. Following the news, Charles Oliveira was reportedly unable to proceed with a scheduled fight against Arman Tsarukyan at UFC 331, necessitating a change to the event's lineup. The loss has deeply impacted the Chute Boxe camp and reignited discussions regarding cardiac screening for elite athletes. The response from UFC leadership drew significant scrutiny. While President Dana White issued a condolence message describing the death as a “freak tragedy” and noting that Nascimento’s team was “literally devastated,” he also faced intense backlash for a social media video of himself smoking a cigar with the caption “great day.” This post was widely condemned by fans and media outlets as insensitive, adding a layer of controversy to the mourning process. ## Claims - He compiled a 4‑2 record in the UFC. (disputed by 26 sources) - He competed in seven UFC fights. (disputed by 3 sources) - Allan Nascimento died on 3 August 2026 at age 34. (corroborated by 26 sources) - He suffered an apparent heart attack while sleeping. (corroborated by 26 sources) - The UFC confirmed his death via an official statement. (corroborated by 26 sources) - Allan Nascimento had a professional MMA record of 22 wins and 7 losses. (corroborated by 26 sources) - His last UFC fight was on 20 June 2026, a split‑decision loss to Mitch Raposo. (corroborated by 26 sources) - He was a member of the Chute Boxe Diego Lima team and a training partner of Charles Oliveira. (corroborated by 26 sources) - Medical staff declared him dead at the scene. (corroborated by 20 sources) - Allan Nascimento was a Brazilian UFC flyweight (57 kg) fighter. (corroborated by 4 sources) ## Timeline ### 2026-08-11: UFC fighter Allan Nascimento dies of sudden heart attack UFC flyweight Allan Nascimento has died at age 34 following a sudden heart attack. UFC President Dana White and fellow fighter Charles Oliveira expressed devastation over the loss of the Brazilian athlete. 2 sources. https://clstr.news/cluster/ufc-fighter-allan-nascimento-dies-of-sudden-heart-attack ### 2026-08-05: Allan Nascimento, 34, UFC Flyweight, Dies from Apparent Heart Attack UFC flyweight Allan Nascimento, 34, died of an apparent heart attack in his sleep on Aug 3, 2026; his death prompted tributes and criticism of Dana White’s insensitive post. 10 sources. https://clstr.news/cluster/allan-nascimento-ufc-flyweight-passes-away-at-34 ### 2026-08-03: Allan Nascimento, 34, UFC flyweight dies of apparent heart attack UFC flyweight Allan Nascimento, 34, died of an apparent heart attack in his São Paulo home on Aug 3, 2026; the organization and peers, including Charles Oliveira, mourned the Brazilian fighter. 43 sources. https://clstr.news/cluster/ufc-flyweight-allan-nascimento-dies-at-34 --- Cite as: Death of UFC flyweight Allan Nascimento. CLSTR, https://clstr.news/situations/brazilian-mma-fighter-death