O'Mahony ruled out of RWC

Ireland flanker Peter O’Mahony has been ruled out of the Rugby World Cup with knee ligament damage, the IRFU has confirmed.

Captain Paul O'Connell spent Sunday night in hospital with a "significant hamstring injury", but will undergo scans today before the end of his tournament is officially confirmed.

Team manager Mick Kearney revealed the huge double blow as Ireland continued to count the cost of Sunday's fine 24-9 victory over France that secured a quarter-final against Argentina.

Out-half Johnny Sexton (groin) is also awaiting a scan.

The Union said on Twitter that an update would be provided later in the day.