A UFC fighter has passed away at the age of 34. The individual, Allan Nascimento, was found unresponsive. The cause of death is believed to be related to a heart issue, as Nascimento apparently suffered a heart attack.

Further details about the incident are available from KTVU FOX 2 News. Limited information is currently known about the circumstances surrounding Nascimento's death, but it is confirmed that he was found unresponsive after an apparent heart attack. For more information, readers can refer to the original report from KTVU FOX 2 News.