Similar?
http://www.volvoforums.org.uk/showthread.php?t=262858
Hopefully your engine is intact.
I've lost count of the number of people who have posted on this forum that the aux belt has snapped and interfered with the cam belt causing a wrecked engine. For every person that posts on here there'll be 10 who have the same happen but not found this forum, or not wanted to.
It's a pity that some sort of class action has not been brought against Volvo. Amateur engineering that went on for years without any fix. Replacing the tensioner under recall helped, but the engine should have some sort of cover protecting the cam belt.
How can it happen frequently on 2004 cars and by 2010 it still feels like Volvo had done very little about it.
I'm a more nervous 58 plate D5 owner.