Allegations of unacceptable behaviour by several Queensland players in the lead-up to State of Origin III could hurt the game in the hip pocket with sponsors saying they were keeping a keen eye on investigations.

The Queensland Rugby League is continuing its probe into events ahead of the series finale in Brisbane following reports of heavy drinking sessions and allegations players had taken a home-made cocktail by mixing the sleeping medication Stilnox with the high energy drink Red Bull.

With many sponsors involved in rugby league already on edge following a litany of off-field incidents this year, major Origin backers including Aussie Home Loans, Harvey Norman, Fourex and AAMI said they were watching developments closely.

"AAMI has been in discussion today with the Queensland Rugby League on this matter but does not comment publicly on player related matters pertaining to its sponsorship," the insurance giant said in a brief release to AAP on Monday.

Aussie Home Loans founder John Symonds warned earlier this year any more player scandals could see him and other sponsors desert rugby league.

When contacted by AAP, a spokesperson for the mortgage broker said: "we're committed to the sponsorship of the Blues in 2009 and 2010.

"The NRL has assured us they are taking the necessary steps to stamp out any unacceptable behaviour and we will continue to monitor their progress."

It has also emerged that a senior Maroons player confronted teammates over their behaviour in camp, but stopped short of reporting his concerns to Queensland's team management.

It is understood he made the approach on behalf of a group of concerned players during the Maroons camp on the Gold Coast before Queensland's failed bid for their first series whitewash since 1995.

QRL managing director Ross Livermore spoke to coach Mal Meninga and team manager Steve Walters over the weekend about the explosive drug allegations and other incidents during the camp.

"Nothing came out of those talks," Livermore told AAP.

"Mal can and will speak to the players involved and we've spoken to managers Steve Walters and Bob Lindner who have not been able to shed any light on things."

However it is understood the QRL has not spoken to any Queensland player about the allegations.

Furious Queensland coach Mal Meninga - who laid down the law before and after Queensland forward Nate Myles disgraced himself by defecating in a hotel foyer earlier this month - branded some of the press reports as "scurrilous rubbish".

"I cannot believe one unsubstantiated story has appeared in a newspaper, and suddenly it becomes the biggest issue in two states and starts undoing all the hard work we have put in over the last four years," fired Meninga.

"It is scurrilous rubbish."

However Meninga, who has a zero tolerance to any drugs, said if someone produced evidence supporting the allegations, the consequences and repercussions for any player involved would be "severe" no matter how big his profile was.

The Cowboys meanwhile moved quickly to kill off talk of a reported rift between their gun halfback Johnathan Thurston and coach Neil Henry amid reports they had a falling out during the Origin camp.

Thurston, Henry and Cowboys chief executive Peter Parr have all played down rumours of a rift.

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