Avril Lavigne's boyfriend, Brody Jenner, was reportedly knocked over the head with a bottle while trying to break up a fight involving his singer girlfriend, it was reported.

Jenner, who was photographed outside of the Hollywood Roosevelt Hotel around 1 a.m. Monday morning with blood streaming down his face, was reportedly attempting to pull Lavigne out of a physical confrontation with another woman at the bar.

Jenner went to the hospital after the incident, according to media reports.

Dozens of videos and images were published online of Jenner standing outside the venue with blood streaming down his face.

RumorFix published on YouTube footage of emergency workers arriving at the bar to escort Jenner to the hospital, as seen below. However, it was reported Jenner refused the escort and went to the hospital on his own.

The Canadian singer's boyfriend had been so delighted to be spending the night with Lavigne that he tweeted the following message and photo to Twitter:

(Photo: Twitter)Brody Jenner uploaded a photo of he and girlfriend Avril Lavigne during their night out Sunday, Nov. 6, 2011.

Not long afterward, though, Jenner followed up with a message about his "interesting" evening with Lavigne:

(Image: Twitter)Brody Jenner commented on a bar fight that left him injured on Sunday, Nov. 6, 2011, on his Twitter account.

According to TMZ, Jenner was briefly detained by law enforcement officials and questioned about his role in the fight. The celebrity gossip website reports that cops "listed Brody as the victim of an assault with a deadly weapon."

By the time law enforcement officials had arrived, all other parties involved — including Lavigne — had already taken off.

Jenner is reportedly the stepbrother of reality TV star Kim Kardashian, according to the Daily Mail.

Kardashian, who recently shocked fans with news of her filing for divorce after 72 days of marriage to Kris Humprhies, is reportedly torn over the divorce and could be seeking to make amends, TMZ reported Monday.