NRL star Andrew Fifita is set to play in Cronulla’s crucial NRL clash with Canterbury on Sunday despite facing allegations of threatening a referee at a rugby league game in Sydney’s west.

Three officials reportedly had to restrain the Sharks and NSW State of Origin forward after he allegedly told the referee “I’ll smash you” during an incident involving his twin brother David.

Chief executive Lyall Gorman on Sunday said while the Sharks have a “zero tolerance” to any behaviour against the club’s values, both brothers remained available to tackle the Bulldogs at Belmore Sports Ground.

Gorman said he would await a full report before taking any disciplinary action, but promised to come down hard on the pair if all allegations were proved.

He said some of the facts were in dispute.

“The club has formed a view at a higher level that the players won’t be stood down until all the facts are available to us,” Gorman said.

“Can I say I got those (a written report from the match officials) in the last half hour.”

News Corp said David Fifita was filling in as a trainer for a team taking part in a Penrith juniors A grade game in Glenwood on Saturday, when he abused the referee for not calling a halt for an injured player.

The 24-year-old referee, said to also be a police officer, began using his mobile phone to film the episode in case it was needed as judiciary evidence, when Andrew Fifita allegedly stepped inside a sideline rope and tried to grab it from him.