Feb. 20 (UPI) -- Blac Chyna's rep says the star is "upset" over her leaked sex tape.
Walter Mosley spoke out in a statement to People after an anonymous Twitter user posted a video Monday morning of Blac Chyna engaging in oral sex with an unidentified man.
"[It's] just another attack against a woman," Mosley said. "An anonymous source posted a tape -- could be from an ex-boyfriend, or stolen, someone texting it to someone else. It's upsetting and troubling."
"It's tough, she's upset," he added. "This is some sick man, I'm sure, who thought this would be funny or cool. It's going to take a while to get to the bottom of it."
Mosley said Blac Chyna is surrounding herself with friends and focusing on work as they let law enforcement investigate the leaked tape.
"This is a job for the police," he said.
Blac Chyna's ex-boyfriend Mechie told TMZ through his rep Tuesday that he is the man in the video, which he said was recorded in July.
Mechie's rep said Mechie recorded the encounter, but never had a copy of the video because it was captured on Blac Chyna's phone. He denied knowing how the video was released.
The leaked sex tape comes six months after Blac Chyna's ex-fiance Rob Kardashian posted naked photos of the 29-year-old star on Instagram. Many condemned Kardashian's actions as "revenge porn" at the time.