Roy Keane has left Nottingham Forest after just five months in the assistant manager's job.

The 47 year-old is said to be looking to pursue a managerial role, having spent nearly six years as Martin O'Neill's assistant, both with Ireland and then at the City Ground.

"Working with Martin over the last few years has been a magnificent experience, one of my greatest in football both as a player and a coach and one I want to personally thank him for," Keane said in a statement released by the club.

The Cork-native was last in charge at Ipswich, but he was fired in January 2011 as the club languished just above the Championship relegation zone.