Sydney Roosters co-captain Mitchell Pearce has offered a brief statement on Friday afternoon, apologising for his recent actions.

Pearce was stood down from all club duties on Thursday morning while the Roosters and the NRL carry out their investigation into the 26-year-old's behaviour on Australia Day, which was captured on video.

"I just want to unreservedly apologise for my actions over the last couple of days. My behaviour was unacceptable and I'm embarrassed, and take full responsibility for my actions," Pearce said. 

"I acknowledge I have a problem with alcohol and it's something I need to address. It's not an excuse but a realisation that I finally need help. 

"Together with the club I'm working on a solution for me to address these issues which will come out in the next couple of days."

Video first featured at roosters.com.au