However, it was deemed the contact was not heavy or high enough to warrant a charge.

Prop Justin Poore and Dean Young also avoided any punishment after being involved in separate fights.

A flurry of punches erupted between Poore and Canberra lock Josh Miller after the Dragons prop had pushed his opponent to the ground while the Raiders attacked the tryline on the other side of the ruck.

The Dragons were penalised for Poore's actions, with Raiders five-eighth Terry Campese slotting the first of two late penalty goals to seal victory.

Earlier, Campese was involved in a fight with Young, which saw the Dragons second-rower sin-binned.

Campese was sin-binned in the 32nd minute for repeated infringements and dissent, while Smith was handed an early shower for the late attempted shot on Croker.

Tensions threatened to boil over for much of the game after the incident involving Young and Campese in the 21st minute.

Two plays later, after the Dragons had been awarded an obstruction penalty but Young handed 10 minutes in the dressing shed, former Raiders prop Michael Weyman was knocked out in a sickening head clash with Miller.

Weyman has been cleared of serious injury and is expected to play against Brisbane at WIN Stadium on Friday.

Suspended centre Beau Scott and second-rower Matt Prior, as well as injured Matt Cooper and Jason Nightingale are expected to be named in the Dragons squad today.

Poore played on Saturday after successfully having a dangerous throw charge on Penrith's Shane Elford downgraded at the judiciary last week.