Wallabies coach Michael Cheika is facing a nervous wait to find out if he is to face punishment following his coaching box outburst during Australia's defeat to England at Twickenham.
An enraged Cheika appeared to be captured by TV cameras saying 'f***ing cheats' after skipper Michael Hooper's hotly-debated try was disallowed for offside by the TMO during the first half of the 30-6 loss to Eddie Jones' side.
Cheika was also embroiled in a heated discussion with an England fan as he left the coaching box and walked down towards the touchline to rearrange his side following the sin-binning of Kurtley Beale just before halftime.
The former NSW Waratahs and Leinster coach later walked away midway through an interview after being quizzed by a beIN Sports reporter about the incident.
Six Nations Rugby tournament and operations director Jon Davis, who is the designated disciplinary officer for the Wallabies tour, is investigating the incident.
A statement from World Rugby on Monday afternoon confirmed a decision is imminent.
Should Cheika be charged, he would face a disciplinary hearing in Edinburgh this week ahead of Saturday's clash with Scotland at Murrayfield.
"Following various media reports and a referral from World Rugby, the disciplinary officer for the autumn internationals is investigating comments and conduct attributed to the head coach of the Australian national team, Michael Cheika, during the match between England and Australia at Twickenham on Saturday," the statement read.
"An update will be issued tomorrow."
Cheika was left enraged by the performance of referee Ben O'Keeffe as the Wallabies saw two players sin-binned and found themselves frustrated by several other decisions in an ultimately convincing loss to England.
The Australian coach's frustration came to a head in a fiery interview with the host broadcaster after the match when it was put to him that replays appeared to show him mouthing the word 'cheat'.
"No I never said, what are you talking to me for?" Cheika asked angrily.
"Is that what’s it's coming down to?
"They can replay it all they like if that's what it's coming down to that's it.
"I'm trying to have an interview without trying to get stuck into that and you want to try and keep making it."
Cheika continued to put the reporter in their place, then admitted he might have sworn before abruptly ending the interview and walking off.
The Wallabies' woes included yellow cards for Hooper and Beale coming in between the former seeing a try disallowed and Elliot Daly being awarded a controversial score for England.
Australia were then denied another try when Stephen Moore was adjudged to have obstructed Chris Robshaw as Marika Koroibete barged over, leaving Cheika - who criticised O'Keeffe following a Rugby Championship draw with South Africa in September - visibly furious.