UPDATED: Biffy Clyro announce Irish shows

The Scottish rockers will play Mandela Hall on December 14 and Dublin's Academy on December 15.

They will also release their long awaited new single 'Mountains' on August 25, the first since the release of the much lauded Puzzle in July 2007.

Tickets for both shows go on sale this Friday (August 8). The Belfast show will cost £18.50 while tickets for the Dublin will cost €25.