LAS VEGAS , Nevada -LRB- CNN -RRB- -- Former football star O.J. Simpson will be held without bail after his arrest on robbery and assault charges , police announced late Sunday . Police released this mug shot of O.J. Simpson after his arrest . Simpson is accused of having directed several other men in an alleged armed robbery of sports memorabilia in a room at a Las Vegas hotel room . Las Vegas authorities said they have no information leading them to believe Simpson was carrying a firearm during the alleged incident at the Palace Station Hotel and Casino . Police said Simpson and other men burst into the room and walked out with the memorabilia , including some that was unrelated to Simpson , police said . `` We do n't believe that anyone was roughed up , but there were firearms involved , '' Lt. Clint Nichols told reporters . Nichols said the firearms were pointed at the victims . A reporter asked Nichols : Was `` O.J. was the boss in that room ? '' Nichols responded , `` That is what we believe , yes . '' Watch Simpson transferred Sunday in handcuffs '' The alleged victims were identified as Bruce Fromong , a sports memorabilia collector who described the incident as `` a home invasion-type robbery , '' and Alfred Beardsley , who has been quoted by celebrity Web site TMZ.com as saying that Simpson later apologized to him and told him he regretted the incident . Acting on a tip , police met over the weekend at McCarran International Airport with 46-year-old Walter Alexander , of Mesa , Arizona , who told them about the alleged robbery and validated the tipster 's information , Capt. James Dillon told reporters . Alexander was arrested Saturday night on two counts of robbery with a deadly weapon , two counts of assault with a deadly weapon , conspiracy to commit robbery and burglary with a deadly weapon . He was released on his own recognizance and returned to Mesa either Saturday night or early Sunday morning , Dillon said . In addition , investigators are seeking four other men they believe accompanied Simpson into the hotel room , Nichols said . Nichols said , `` There is a social relationship between the individuals that we identified and O.J. Simpson . '' Though Simpson is not accused of having brandished a gun himself , two firearms that police said were used were recovered early Sunday in one of three searches . Investigators would would not divulge where the weapons were found . Nichols dismissed an initial report that the men may have been off-duty police . `` There is no truth to that whatsoever , '' he said . `` That came as a result of some language that was used when the individuals burst into the room that led our victims to believe that they may have been police . '' Simpson , 60 , has acknowledged taking some items that belonged to him , but he has denied that any weapons were involved . `` Whether the property belonged to Mr. Simpson or not is still in debate , '' Nichols said . `` We are still in the process of sorting that out . '' Nichols also said that some of the property taken had Simpson 's signature . But `` there was some other property taken as well , '' he said . `` I believe there were some Joe Montana cleats and some signed baseballs and other stuff . '' The latest charges against Simpson mean he faces the prospect of another prosecution , more than a decade after the June 1994 stabbing deaths of his ex-wife , Nicole Brown Simpson , and Ron Goldman . Simpson was acquitted of murder the following year . The trial riveted much of the United States . But in 1997 , a jury found him liable for the deaths in a civil case brought by the Goldman family . Simpson was ordered to pay the families a total of $ 33.5 million for the deaths Goldman had gone to Nicole Simpson 's Los Angeles home to return a pair of glasses the day of the slayings . Goldman 's sister , Kim Goldman , said she was n't surprised by the robbery allegations , since Simpson `` thinks he can do no wrong . '' `` He 's capable of stabbing people to death , so I think robbery is nothing surprising , '' she said . `` Normal , logical , civil-minded , law-abiding people do n't storm a room with guns demanding stuff back . '' Fromong had testified on Simpson 's behalf in the civil case , telling the court that prices for Simpson memorabilia had dropped substantially since the 1995 verdict . His testimony was part of the defense 's contention that Simpson could not afford to pay the Goldmans . Simpson recently wrote a book originally titled `` If I Did It '' and had planned to publish it himself , but a public outcry led to the cancellation of his book deal . A bankruptcy judge subsequently awarded the Goldmans the rights to the book in light of their inability to collect the wrongful death award . The Goldmans retitled the book , `` If I Did It : Confessions of the Killer . '' That book just hit bookstores . E-mail to a friend CNN 's Ted Rowlands contributed to this report .