Ilkay Gundogan has been sidelined by a knee injury since December. Martin Rickett/PA Images via Getty Images

Manchester City midfielder Ilkay Gundogan has taken part in a light training session as he steps up his recovery from a knee ligament injury.

Gundogan has not played since he damaged ligaments in his right knee during City's home match against Watford on Dec. 14.

But he was pictured taking part in an individual session with City's medical staff at the club's training ground on Tuesday.

The Germany international, 26, joined City from Borussia Dortmund last summer and made 16 appearances, scoring five times including a brace in the 3-1 Champions League win over Barcelona.

Also on Tuesday, Manchester City announced that goalkeeper Angus Gunn will return to Norwich City on a season-long loan.

Gunn 21, came up through Norwich's academy before moving to Manchester in 2011. He has yet to play for City's senior team but was commonly available on the bench last season.

"It's a great pleasure for me to come back and sign on loan," Gunn told Norwich's website. "The main thing for me is to come and get experience, so to mix that in with coming to Norwich is a great feeling."