It's unclear whether the recently surfaced video was taken before or after he was officially diagnosed with the virus

Last week, Sheen sent shockwaves when he announced he had been

A new video has reportedly surfaced, showing Charlie Sheen smoking crack-cocaine and performing oral sex on another man the same year he was diagnosed with HIV.

The troubled 50-year-old actor made headlines last week when he went on the Today show to confirm he has been battling the virus for the past four years.

While Sheen said it was 'impossible' for him to have spread the virus, multiple sex partners have come forward saying they had unprotected intercourse with the former Two and a Half Men star and that he didn't tell them he had the sexually-transmitted disease, according to media reports.

A video has reportedly surfaced showing Charlie Sheen performing oral sex on another man in 2011 - the same year he was diagnosed with HIV. The 50-year-old actor pictured announcing the diagnosis on the Today show last week

Adding to the shocking story is a video allegedly obtained by Radar Online last week, which reportedly shows Sheen smoking crack and having sex with another man in a Las Vegas hotel room. Radar hasn't published the video.

Sources told the gossip site that the video was recorded in 2011 - the same year that Sheen was diagnosed with HIV. But it's unclear if Sheen caught the virus before or after the incident.

The video clips were reportedly at the center of a $20million lawsuit against Sheen, filed by the other man in the video who claimed he got herpes from the actor.

According to Radar, the clips last about 30 seconds each and show Sheen smiling and smoking crack before seducing the other man, who is not named.

The man in the video says Sheen claimed he had 'no venereal disease' but that after their tryst he was diagnosed with herpes, his lawsuit alleged.

During their hotel room hook-up, Sheen's alleged male partner says they engaged in 'mutual oral copulation, mutual self-gratification, rubbing and massaging each other, play-wrestling, licking and (unprotected) intercourse.'

Following the diagnosis, that man filed a lawsuit against Sheen claiming the actor 'entered into a nefarious plot designed to lure Plaintiff into his luxurious hotel room to serve his prurient desires'.

Sheen reportedly paid millions to settle the case out of court, and get the original tapes. But a bootleg copy surfaced and was given to Radar, the gossip site claims.

'Charlie had his team buy it off the market and settle the lawsuit because he and his camp believed it could destroy his life if it ever got out,' Radar's source said.