Former Saved By The Bell star Dustin Diamond has been "quarantined" from the rest of the cast of US reality series CELEBRITY FIT CLUB after fighting with fellow contestants. Diamond got into a very public row with former American Idol contestant KIMBERLEY LOCKE, which caused her and 1980s pop singer Tiffany to storm off the set. After the women walked off the program, producers halted production and sent the cast home. During the heated argument Diamond allegedly said, "Screw Kimberley Locke. I'm going to make a dildo of my c**k and f**k her with it." After Locke gave producers a "him or me" ultimatum, they decided to exile Diamond from other cast members. An on-set source tells, "He will not participate in the challenges and will have a private weigh-in for this weekend's upcoming filming. Unfortunately, there are only three more tape-days left over the next 30 days. So it was too late to replace him." Diamond, who played SCREECH in the US TV series, made headlines last year (06) when he starred in a raunchy sex tape which showed him engaging in sex with two women.