The Australian Sports Anti-Doping Authority is not naming players in Tuesday’s briefings to the six NRL clubs mentioned in the Australian Crime Commission report.

ASADA issued a statement confirming the meetings, which are believed to be occurring in Sydney throughout the day, but said they would be light on for specific information.

There was no mention as to whether the clubs will be told what they are being investigated for.

“This briefing will not name players, but rather describe to clubs the investigation process ASADA will follow,” the statement read.

“ASADA is unable to talk or speculate about sports or individuals during an investigation or results management process.

“This ensures the integrity of the investigation and the privacy of any individual under investigation is protected.”

Australian Rugby League Commission chief executive David Smith said he could not give a timeline on how long the on-going investigations would take or when specific details might be made public.

Manly, Cronulla, Penrith, Canberra, North Queensland and Newcastle are the NRL clubs mentioned in the ACC report into sports doping and corruption.

They were advised by the NRL on Monday night but given no further information, leaving them unaware what they were being investigated over.

“There is a briefing with ASADA and respective clubs as part of an ongoing investigation,” said Smith.

“It will take the ongoing investigations to the next stage. I can’t pre-judge how long that will take.”

Investigators from auditors Deloitte visited the Knights last week, and seven-time premiership-winning coach Bennett said they checked on records as far back as seven years ago.

Bennett, who only took over as Knights coach for the 2012 season, said he has quizzed all staff and players and was confident the current Newcastle set-up have nothing to worry about.

“They want us to confess to something. I’m racking my head what we’ve got to confess to,” said Bennett.

“I’ve been through the staff, I’ve checked with all the players.

“Whatever they’re looking for, it hasn’t happened in the past 18 months. So after that I’ve got no idea.

“The information we’re getting when they arrived here last week looking for records … they were certainly talking about other years as far back as 2005 perhaps.

“We’ve just got no idea. We’ve complied with everything they’ve asked for and we’ll continue to do that.

“We’ve got nothing to hide, not since I’ve been here anyway.”

Penrith captain Kevin Kingston said he was confident the club does not have a `drug problem’.

“We trust our sports scientists. We don’t take anything out of the ordinary. I barely take protein myself,” Kingston said.

“I don’t think there is a drug problem at our club.”