Ireland flanker Tommy O'Donnell has been ruled out of the World Cup due to the hip dislocation he suffered in Saturday's 35-21 win over Wales at the Millennium Stadium.

The 28-year-old Munster forward, who has won nine caps, was carried off during the second half after producing an outstanding display in Cardiff.

He spent Saturday night in hospital in the Welsh capital and subsequently underwent detailed medical checks.

In a statement, the Irish Rugby Football Union said: "Investigations at University Hospital Wales yesterday afternoon confirmed that Tommy suffered a hip dislocation in the game against Wales.

"He will be limited to non-weight bearing activity for at least six weeks and has unfortunately been ruled out of participating in RWC15."

O'Donnell's loss will be a blow to Ireland head coach Joe Schmidt as he prepares to continue the tournament build-up with further preparation fixtures against Scotland, Wales and England.

Ireland, the reigning RBS 6 Nations champions, will contest the same World Cup pool as France, Italy, Canada and Romania, with two teams securing quarter-final places.

The IRFU, meanwhile, said that wing Andrew Trimble will undergo "a precautionary scan" on the foot injury he suffered during the Wales match.