Rhys Ruddock has been forced to withdraw from Ireland's World Cup squad through injury.

The Leinster flanker will miss the tournament after breaking his arm for the second time in six months.

"Rhys Ruddock would have been selected but has been ruled out after fracturing his arm against Uruguay last week," Ireland coach Joe Schmidt told reporters.

"The squad selection has been a long process with some very tight decisions.

"Some injured players who are getting close to full fitness have been included while others have missed out due to prolonged absence or lack of opportunity to demonstrate their full test match readiness."

Paul O'Connell has been named as the captain of Ireland's 45-man training squad.