UPDATE x 12: The UK broadcast of the WWE Hall of Fame ceremony aired Wednesday night and began with the following:

In Memory of James Brian Hellwig, The Ultimate Warrior 1959-2014.

UPDATE x 11: More details are coming in regarding the final days of the Ultimate Warrior.

WWE had a camera crew following Warrior and his family around during the entire weekend. The footage was shot for a future project looking at Warrior's return to the WWE Universe.

Warrior and his family did not stay at the Roosevelt Hotel with the rest of the WWE talent. The company rented a house locally for Warrior and his family and had a car service shuttle them to and from the Hall of Fame ceremony, WrestleMania and RAW.

According to sources who were backstage at the Hall of Fame ceremony, Warrior was very friendly when approached, but also quiet and somewhat reserved. Several people commented on Warrior sweating a lot and appearing physically frail, despite his muscular stature.

TMZ.com reports that an eye witness saw Warrior clutching his chest moments before he collapsed at the Gainey Suites Hotel in Scottsdale, Arizona.

Warrior suffered a "catastrophic medical event" and so far, there is no evidence of drugs or alcohol playing a factor in his death. An investigation is underway and the Maricopa County Medical Examiner will be conducting an autopsy on Thursday.

UPDATE x 10: WWE has announced that they will honor the career of Ultimate Warrior, posting the following:

WWE honors the legacy and legend of the late Ultimate Warrior tonight, beginning at 8 p.m. ET on WWE Network.

WWE fans will be able to watch highlights from Warrior's historic induction into the WWE Hall of Fame, plus his emotional return to Monday Night Raw. Then, immediately after, the WWE Universe is invited to watch one of Ultimate Warrior's greatest matches against Hulk Hogan when WWE Network airs WrestleMania VI in its entirety.

UPDATE x 9: The AP has a story with quotes from Triple H and Sean Waltman about Warrior's death. Check out those quotes below:

Triple H on Vince McMahon and Ultimate Warrior's interactions: "Vince said to him a couple of days ago, 'I've always loved you. Sometimes, I didn't like you, but I always loved you.'"

Waltman on Warrior's state: "I got a sense he wasn't well. It was sad to me. He was kind of hunched over. He used to have such great posture. You just had this sense that he wasn't well. But he was in great spirits. He came up to (other wrestlers) and gave them hugs."

UPDATE x 8: ESPN has coverage of The Ultimate Warrior's passing, and discussing his legacy, which you can check out below…

UPDATE x 7: According to TMZ, eyewitnesses say that Warrior looked sweaty and stressed, like he was about to "burst at the seams" during WrestleMania weekend. People who saw him over the weekend state that Warrior looked like he was in constant pain, sweaty and uncomfortable; like he was choking on his tie.

During his RAW appearance, people noticed he appeared weak after he did rope shake. One witness had the following to say…

"We all felt like he looked like he was going to blow a gasket. It was pretty easy to see."

UPDATE x 6: According to sources, Warrior and his family did not stay at the WWE hotel in New Orleans. The company rented a house locally for Warrior and his family and had a car service shuttle them to and from events. Those backstage at the Hall of Fame said that Warrior was friendly when approached at the Hall of Fame, but quiet and reserved most of the evening.

UPDATE x 5: According to TMZ, law enforcement officials that spoke to witnesses have stated that Warrior "clutched his chest" moments before he collapsed. Reports are that Warrior was walking down a hallway at the Gainey Suites Hotel in Scottsdale, AZ and headed toward his car with his wife. At one point he clutched his chest and then fell to the floor, and never recovered.

No official cause of death has been revealed, with officials noting that Warrior had a "catastrophic medical event," likely a heart attack. At this time, there is no sign that drugs or alcohol had anything to do with his death. The death is being investigated, and they are planning to do an autopsy and toxicology tests to confirm the cause of death.

UPDATED x 4: A fan tweeted this photo with the Ultimate Warrior on Tuesday at the New Orleans airport, just hours before Warrior's death.

UPDATED x 3: TMZ reports that Warrior collapsed outside his hotel in Arizona at 5:50PM PT on April 8th. He was walking to his car with...