The Sydney Roosters lock is believed to have been removed from a flight to Sydney on Saturday night after the club's win over Gold Coast.

Radley was not travelling with the rest of the Roosters team and had travelled instead with friends to watch friend Ben Thomas make his debut.

It's understood he was removed from the flight on Saturday night while allegedly intoxicated and instead flew home with Roosters officials on Sunday morning.

There is no suggestion he was abusive or violent towards staff and the Roosters have since informed the NRL of the matter.

"The integrity is aware of an alleged incident and is liaising with the club," an NRL spokesman told AAP.

It's not the first time Radley has been looked at by the integrity unit this year.

He was handed a two-match ban in March for a breach of the game's code of conduct when he allegedly tackled a man outside a house party in Byron Bay.

The 23-year-old was last month denied a State of Origin debut when he was suspended for five games over a high tackle and dangerous contact.

The NRL confirmed on Tuesday he would be able to return in round 17, with Origin I counting towards his ban given he was likely to be picked for NSW but not Origin II.

Australian Associated Press