"It is rare in football these days that a player gives such length of service to one club," managing director Lee Charnley told the club's website (www.nufc.co.uk).
"In the eight years he has been with us, Colo has become a firm friend and colleague to many players and staff, past and present, who I know will miss him."
(Reporting by Shravanth Vijayakumar in Bengaluru; editing by Clare Lovell)
