Paul Gallen and several current and former Cronulla Sharks have accepted bans from ASADA through to November.

Cronulla captain Paul Gallen has apologised for an abusive tweet he directed at the NRL on Thursday. 

The offensive tweet, which was quickly deleted from Gallen’s account, will come under investigation from the NRL integrity unit after he abused the game's head office via Twitter in the wake of Cronulla CEO Steve Noyce's sacking.

Gallen issued an apology via social media site Instagram on Friday afternoon. 

“I would like to apologise to anyone I offended in my tweet yesterday and to anyone who took offence to the language I used. I realise in the position I’m in this was unacceptable. Gal.”

NRL CEO David Smith said he had not seen Gallen's offensive comments, but confirmed they would come under investigation.