Munster flanker Peter O'Mahony will miss Saturday's United Rugby Championship showdown with rivals Leinster because of a hamstring injury.

The 35-year-old Ireland captain picked up the injury in last weekend's 23-0 victory over Ospreys in Cork.

O'Mahony and prop Oli Jager, who hurt his neck against the Welsh side, were both forced off in the first half.

Munster issued a squad update for the Croke Park match on Tuesday and said O'Mahony and Jager "will go for scans and are both unavailable".

Leinster sit top of the URC table after winning their opening three games while third-placed Munster are four points behind.

More than 70,000 tickets have been sold for the game in Dublin, which kicks off at 17:45 BST.

O'Mahony's injury comes a month before Ireland's autumn internationals opener against New Zealand at the Aviva Stadium.

The All Blacks game is followed by Dublin encounters against Argentina, Fiji and Australia.