A rapper was arrested after allegedly beating up some T-shirt touts and robbing them outside an Orange County concert venue.

Harlem hip-hop favorite Immortal Technique was taken into custody after his sell-out show at The Observatory in Santa Ana Thursday night.

The 37-year-old, real name Felipe Coronel and his 40-year-old promoter Stephen McDaniel, were arrested after being identified as among a group of up to 12 men who allegedly took T-shirts, cash and cell phones from the touts.

"(When) officers got there and located the two victims who were just outside the Observatory property selling shirts that had the likeness of the rap artist on it," Cpl. Anthony Bertagna, of Santa Ana Police Department said.

Coronel and McDaniel were both arrested after the show was over.

"It was a sold out concert. Obviously the Officers didn't want to go in there, shut the concert down and then have additional issues," Cpl. Bertagna said.

Immortal Technique boasts a million social media followers and official T-shirts on his website sell for $20 each.

He was allegedly unhappy that he was not receiving any of the profits being made from the allegedly fake merchandize.

After posting $50,000 bail he went back on tour. The case is now being handled by prosecutors.

Music fans at The Observatory had mixed feelings about the arrest.

"Celebrities do make a lot of money compared to the common person. I'm pretty sure the people selling this stuff come from a low income background," Jasmine Guillen said.

"Oh. I love Immortal Technique. He should get a profit then," Taylor Smith said.