The IRFU and Ulster Rugby have cancelled the contracts of Paddy Jackson and Stuart Olding with immediate effect.
It follows an internal review which was called after the pair were acquitted of the rape of a 19 year old girl last month.
The pair have faced criticism for other aspects of their behaviour and several major sponsors of Ulster Rugby have raised concerns.
Meanwhile, Craig Gilroy has been sanctioned over a message sent following the alleged incident in 2016, and will be unavailable to play for Ulster until the 26th of April.
In a statement, the IRFU have said they'll conduct an in-depth review of current structures and educational programmes within the game in Ireland.
Both players responded in statements to the Press Association:
Paddy Jackson tells @PA he is “deeply disappointed” to have been sacked by Ulster and Ireland. pic.twitter.com/7X3Mf4711M
— David Young (@DavidYoungPA) April 14, 2018
Stuart Olding also expresses regret at the move to sack him. pic.twitter.com/K8KTo3ccwK
— David Young (@DavidYoungPA) April 14, 2018