Munster's injury worries are mounting ahead of their second Heineken Cup game of the season against Gloucester next weekend.

Paddy Butler has been ruled out of action for at least eight weeks.

He underwent surgery in Limerick yesterday after sustaining a fracture to his right thumb in Saturday's defeat to Edinburgh.

Simon Zebo will undergo a scan on his left ankle this week to identify the full extent of his injury, while James Coughlan's injury will be monitored as the week progresses.

Munster suffered a 29 - 23 reverse to Grieg Laidlaw inspired Edinburgh side to get their Heineken Cup campaign off to a poor start.

©INPHO/Dan Sheridan