R&B star Ray J was detained by Las Vegas police on Sunday (18Sep11) after fighting with rapper Fabolous.

WENN — R&B star Ray J is talking about being detained and later released by Las Vegas police this weekend after fighting with rapper Fabolous.

Rumors suggest Fabolous got the better of Ray J, who reportedly threw the first punch at the luxury hotel and casino Palms Las Vegas, before police intervened and handcuffed Brandy’s younger brother for his bad behavior.

An angry Ray J called in to Los Angeles radio station Power 101.5 on Monday morning to clarify the reports.

He said, “It’s like, don’t disrespect me and Floyd like that, so when I seen him, I was with Floyd and 50 (Cent), and (Fabolous) tried to say, ‘Don’t touch me’, and I touched that n—–.”

Ray J continues, “I got detained. … I got kicked out of the motherf—— Palms hotel! Police arrested me, handcuffs.”

Authorities in Las Vegas say Ray J was not formally arrested and was soon released without charge.

The singer turned reality TV regular was in Sin City for boxer Floyd Mayweather Jr.’s Saturday night fight with Victor Ortiz, after appearing in an episode of TV documentary “24/7,” which chronicled the road to the big fight.

Fabolous made fun of Ray J’s cameo, in which he is shown playing the piano in Mayweather Jr.’s living room and singing his song “One Wish.” The rapper wrote on Twitter, “Floyd saying we havin a concert in my living room & the camera cuts to Ray J singing ‘One Wish’ on the piano had me in tears!! Get it..? Ray J concert in the living room!! *Lil Wayne voice*”

The tweet infuriated Ray J, and a chance meeting between the pair on Sunday sparked the heated exchange.