Las Vegas police launched an investigation into singer Chris Brown Saturday after receiving reports that the R&B recording artist was involved in a violent incident. Brown was being investigated for battery after a woman said he attacked her at the Palms Casino Resort, according to media reports.

Las Vegas police Lt. Jeff Goodwin told the Associated Press authorities received a call just before 10:30 a.m. Saturday but refusing to release any details about the investigation.

The accuser was attending a private event in Brown's suite at the Palms, TMZ reported, and was able to sneak her cell phone past Brown's security detail. At one point she took a picture of Brown, infuriating the singer, who “went off, yelling at her and punching her once in the right eye,” according to TMZ. The woman, Liziane Gutierrez, told TMZ she wished to be publicly identified.

“Her claim that she has her phone in her possession inside the after-party and was able to take a photo, causing an altercation with Chris Brown, is a complete fabrication,” said a representative for Brown, as quoted by the Daily Mail. “I'm not sure what mood-altering substances Ms. Gutierrez was on, but her statements are completely false and not based in reality. This seems like a clear case of retaliation for her bruised ego.”

This incident comes after the infamous night in 2009 when Brown assaulted then-girlfriend Rihanna in a vehicle before the Grammy awards. Brown, who punched Rihanna, leaving her with swollen lips and scratch marks throughout her face, ultimately pleaded guilty in connection with the assault and was sentenced to five year's probation, which expired in March.

“It's not a subject to sweep under the rug, so I can't just dismiss it like it wasn't anything, or I don't take it seriously,” Rihanna told Vanity Fair. “But for me, and anyone who's been a victim of domestic abuse, nobody wants to even remember it.”