A horror day for Canberra on the injury front has been made worse by a $5,000 fine from the NRL after coach David Furner allegedly approached match officials during Sunday's loss to North Queensland.

Furner is accused of approaching the referees at halftime during the 40-24 loss to the Cowboys at Canberra Stadium, questioning several decisions as they left the field for the break.

"Reports from the referees and the ground manager confirmed Furner approached the officials as they left the field and questioned several decisions made in the first half," a statement from the NRL said.

Canberra led Sunday's clash 22-0 after 21 minutes before the Cowboys scored three quick tries in the 10 minutes before the break.

"While the comments were in no way abusive, we cannot allow a situation where coaches or officials make comments towards match officials while the match is still in progress," NRL director of football operations Nathan McGuirk said.

"There are plenty of opportunities for clubs to question decisions relating to a match but this simply was not one of them."

The last-placed Raiders have five days to respond to the breach notice or they will be required to cough up the $5,000.

The fine compounded bad news on the injuries suffered on Sunday by key men Terry Campese and Josh Dugan.

Campese's comeback from a nine-month layoff after knee surgery lasted just nine minutes, with the shattered Canberra five-eighth sidelined again for up to six weeks with a groin problem.

"There's people worse off than me ... I'm still lucky to be in the position I am," an optimistic Campese said on Monday.

"I've just got to keep my head up and do the right thing by my injuries."

He will undergo scans on Tuesday afternoon to determine the extent of the damage but is expected be out for 2-6 weeks.

NSW State of Origin fullback Dugan will miss Wednesday week's clash with Queensland and 3-5 weeks with ankle syndesmosis following scans on Monday.

In other injury news, Sydney Roosters centre Shaun Kenny-Dowall suffered ligament damage to his ankle in Saturday night's win over the Warriors and will miss 2-4 weeks.

Penrith say injured NSW centre Michael Jennings will miss up to six weeks with his ankle syndesmosis, putting him in doubt for game two of the series.

Meanwhile, the NRL says police have concluded there was no evidence of criminal activity regarding bets being placed on Melbourne to win the wooden spoon before they were stripped of competition points for salary cap breaches last year.

The NSW state crime command has reviewed an NRL report into betting activity undertaken by racing industry investigator Ray Murrihy.

"We have always believed that we took the appropriate action in relation to the matter and this finding endorses that view once and for all," NRL chief executive David Gallop said.

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