Gavin Henson has been suspended by Cardiff Blues over allegations of misbehaviour on a Saturday morning flight from Scotland.
Henson, 30, was a wing replacement in their 31-3 defeat by Glasgow on Friday. The Blues issued a statement confirming Henson's suspension on Saturday night.
It read: "Cardiff Blues can confirm that Gavin Henson has been suspended with immediate effect following an incident on the flight back from Scotland after their match against Glasgow Warriors last night [Friday]."
The Blues management will meet on Monday to "discuss the matter further".
Henson signed an eight-month contract with the Blues in October after French side Toulon opted not to extend his deal with them at the end of last season.
A two-time Grand Slam winner with Wales, Henson has struggled to cement a regular place in club rugby since injuring his ankle in March 2009 and taking 18 months of unpaid leave from Ospreys five months later.
He joined Saracens in October 2010, but played only four games for the Premiership side before asking for his contract to be terminated to allow him to join Toulon.
Henson scored a try in a win over Stade Francais on his debut, and was briefly suspended for a breach of the club's disciplinary code before the punishment was lifted following an internal inquiry
Since moving back to Wales, he has played eight matches and is yet to score a try.
His last international appearance was in Wales' 19-9 victory over England at the Millennium Stadium in August, but a wrist injury sustained in the game ended his hopes of playing in the World Cup
FACT-FILE
Born: 01/02/1982; Bridgend
Positions: Fly-half, centre, full-back
Clubs: Swansea, Ospreys, Saracens, Toulon, Cardiff Blues
Test honours: 33 Wales caps, 1 Lions cap