He was transported to a nearby hospital, where he was pronounced dead.
Warrior -- real name James Hellwig -- was a true WWE legend ... and was one of the most iconic wrestlers of all time. He was 54-years-old.
Warrior was just inducted into the WWE Hall of Fame the night before Wrestlemania XXX this weekend ... and this week he made his first appearance on "Monday Night Raw" in years.
Triple H just tweeted, "Saddened to announce the passing of the Ultimate Warrior. Icon and friend. My sympathy to his wife Dana and his daughters."
Stephanie McMahon also tweeted, "#RIPUltimateWarrior Your strength of character is to be admired. There will never be anyone like you. Your spirit lives on in your family."
Hulk Hogan -- Warrior's greatest rival -- has also tweeted, "RIP WARRIOR. only love. HH"
Kevin Nash wrote, "So happy I embraced Warrior with a hug when we saw each other backstage Saturday night.My heart goes out to his family.Always Believe."
Warrior posed for some pics at the airport in New Orleans around 6am Tuesday morning. We're told he was in great spirits and offered to take photos with any fan who approached him.
WWE posted a message on the official website saying, "WWE is shocked and deeply saddened to learn of the passing of one of the most iconic WWE Superstars ever, The Ultimate Warrior. "
"Warrior began his WWE career in 1987 and quickly went on to become one of the biggest stars in WWE history. Warrior became WWE Champion at WrestleMania VI, defeating Hulk Hogan in an epic encounter. We are grateful that just days ago, Warrior had the opportunity to take his rightful place in the WWE Hall of Fame and was also able to appear at WrestleMania 30 and Monday Night Raw to address his legions of fans."
"WWE sends its sincere condolences to Warrior’s family, friends and fans. Warrior was 54 and is survived by his wife Dana and his two daughters."