OAKLAND -- An 18-year old aspiring rapper who claims he was "viciously attacked and beaten" by comedian Katt Williams inside the performer's tour van Wednesday night has sued Williams and his promoters.

Oakland civil rights attorney Pamela Price filed the civil suit in Alameda County Superior Court on Friday afternoon on behalf of Delvahn Mosley-Davis, who Price said has severe injuries to his head, neck, arms, torso and face. The man said Williams and his bodyguard both hit him with fists, and then one of them smashed a bottle over his head.

Price said Mosley-Davis tried to defend himself during the brawl. "He tried to hit back, and the bodyguard hit him," she said.

Williams' agent did not return several calls and an email for comment Thursday and Friday. Williams could not be reached for comment Friday.

Williams was never booked into jail in connection with the incident and was released from custody Thursday morning without any formal charges filed.

Williams, whose real name is Micah S. Katt Williams, is an actor, comedian and rapper known for his roles in the movies "Friday After Next" and "Norbit." Price said the teen and a group of female and male friends happened upon Williams, 41, and his crew outside the Courtyard Marriott on Broadway on Wednesday evening.

Williams is on a Live Nation backed tour with a stop in Oakland on Friday ¿night and stops in Fresno on Saturday and Sacramento next week.

"The group of (young people) were downtown and discovered Katt Williams on the street and were engaging him and trying to meet him and get his autograph," Price said.

Williams allegedly invited the group into the tour van but then ordered everyone but his bodyguards and friends and Mosley-Davis to leave. Williams and Mosley-Davis began a "rap battle," and then out of nowhere Williams swung his fist at the victim, Price said.

"He said he was completely surprised," Price said. She said she was told that the comedian also pointed a gun at Mosley-Davis, but police would not confirm that.

Police were first called about 8 p.m. about a man bleeding from the head in the 900 block of Broadway.

Williams was arrested a short time later in the 200 block of Washington Street in downtown. He was released about 11 a.m. Thursday after police questioned him and other witnesses.

Mosley-Davis was taken to Highland Hospital, where he was treated and released, Price said.

Price said her client was not available for comment Friday.

Police on Friday would not discuss the case, saying it is pending further investigation.

Price plans to seek a court order to keep Williams' tour van in town for further investigation. It has not been impounded by Oakland police.

Williams is also facing a $5 million lawsuit filed earlier this month by his personal assistant, who maintains he hit her in October in Los Angeles and caused permanent eye injuries.

The comic was also involved in shoving match during a Nov. 1 standup performance in Denver, when he jumped offstage to confront a heckler.

In June 2011, Los Angeles Sheriff's Office deputies arrested him on charges of false imprisonment for an incident involving a man on a tractor in Palmdale, according to published reports. Between November 2006 and June 2011, Williams was arrested at least two other times on weapons charges and burglary, and he spent time in jail on those cases, according to published reports.

Staff writer Harry Harris contributed to this report. Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.