Eyewitness accounts of The Ultimate Warrior’s physical condition in the days and moments before his passing may provide hints on the cause of his death, according to a pair of reports that state he may have had a "massive heart attack."

The WWE Hall of Famer, whose real name was James Hellwig, died Tuesday night at the age of 54, TMZ reports. Eyewitnesses said the Warrior was walking through the halls of an Arizona hotel with his wife when he suddenly collapsed. He was rushed to a hospital, where he was pronounced dead.

Law enforcements sources spoke to eyewitnesses who confirmed that the Warrior “clutched his chest” right before his collapse, the gossip site reports. Furthermore, officials allegedly believe that he suffered a “catastrophic medical event” on Tuesday night; as of now, there is no evidence that drugs or alcohol contributed to his death. According to TMZ, officials believe "all signs point to massive heart attack."

In addition, separate sources, who purportedly spent time with the Warrior over the weekend, say he seemed ready to “burst at the seams” in his last days, TMZ reports. The decorated wrestler allegedly appeared to be sweaty and physically uncomfortable. “We all felt like he looked ready to blow a gasket,” a source told the website. “It was pretty easy to see.”

Warrior sweated profusely during his appearance on “Monday Night Raw” in New Orleans this week, where he spoke to fans just hours before his death. During his speech, Warrior spoke frankly about death and his legacy as a professional wrestler.

“Every man’s heart one day beats its final beat. His lungs breathe a final breath,” he said. “And if what that man did in his life makes the blood pulse through the body of others, and makes them bleed deeper and something larger than life, then his essence, his spirit, will be immortalized.”

An official cause of death will not be revealed until officials perform a complete autopsy, TMZ reports. The procedure is scheduled to occur on Thursday. Warrior is survived by his wife, Dana, and his daughters.