LAS VEGAS — O.J. Simpson says he went into a casino hotel room only to retrieve memorabilia that he felt was stolen from him. But police are investigating it as an armed robbery and named the fallen football star as a suspect Friday in yet another surprising chapter to his legal saga.

In an interview with The Associated Press, Simpson insisted there were no guns involved and that he went to the room at the Palace Station casino only to get stolen mementos that included his Hall of Fame certificate and a picture of the running back with J. Edgar Hoover.

"It's stolen stuff that's mine. Nobody was roughed up," Simpson told the AP.

Las Vegas Metro Police Capt. James Dillon said the confrontation was reported as an armed robbery involving guns. But he said no weapons had been recovered and stressed that the investigation was in its "infancy."

Simpson was questioned by police immediately after the incident Thursday night, and a formal interview was being arranged, Dillon said. No charges had been filed and no one was in custody.

Simpson said auction house owner Tom Riccio called him several weeks ago to say some collectors "have a lot of your stuff and they don't want anyone to know they are selling it."

Simpson, who was in Las Vegas for a friend's wedding, said he arranged to meet Riccio at the hotel. Riccio had set up a meeting with collectors under the guise that he had a private collector interested in buying Simpson's items.

"We walked into the room," Simpson said in the telephone interview. "I'm the last one to go in and when they see me, it's all 'Oh God."'

Simpson said he was accompanied by several men he met at a wedding cocktail party, and they took the collectibles.

Simpson said he wasn't sure where the items were taken.

Dillon said some of the items had been recovered. He did not specify which collectibles were located.

A message left for Riccio was not immediately returned.

Police spokesman Jose Montoya said when officers talked to Simpson, he "made the comment that he believed the memorabilia was his. We're getting conflicting stories from the two sides."

One of the collectors in the room was Alfred Beardsley, a real estate agent and longtime collector of Simpson memorabilia, some of which he has been ordered to turn over as part of the Goldman's lawsuit.

"I'm OK. I'm shaken up," Beardsley told the AP by phone, but wouldn't comment further, citing the police investigation.

Bruce Fromong, a collector who testified at Simpson's civil trial, said he was in the room when Simpson barged in with other men.