Norwich City will have to be “patient” in their pursuit of Celtic goalkeeper David Marshall according to his agent.The Canaries had a bid worth up to £500,000 rejected by the Glasgow giants on Wednesday but manager Peter Grant will not take 'no' for an answer and wants to revive the deal as soon as possible.

Norwich City will have to be “patient” in their pursuit of Celtic goalkeeper David Marshall according to his agent.

The Canaries had a bid worth up to £500,000 rejected by the Glasgow giants on Wednesday but manager Peter Grant will not take 'no' for an answer and wants to revive the deal as soon as possible.

However, Marshall's agent, Willie Mackay, revealed that other Championship clubs are interested in the 22-year-old's services, who handed in a transfer request this week after learning that he was likely to have to play second fiddle to Celtic's Polish 'keeper Artur Boruc next season.

“David wants to come to Norwich but we are just going to have to wait for further developments,” said Mackay. “There are other clubs interested but we will have to wait and see how the situation unfolds.

“Neil Doncaster is hoping to get something sorted soon but the club may have to be patient as it is something that could just run and run. It's impossible to put a timescale on it.”

Marshall was on loan at Norwich for five games last season before injuring his ankle ligaments in the FA Cup fifth round defeat to Chelsea.

The Scot was then forced to return to Scotland to continue his rehabilitation but Mackay revealed that Norwich have been paying the player's wages during that time.

“Norwich have been unlucky in some respects because they got David on loan last season and have ended up having to pay his wages while he's been injured.

“I've no idea of what kind of fee they are looking for - that's obviously up to Celtic.”

Mackay indicated that despite interest from other clubs that Norwich would be Marshall's first choice destination as the player was impressed with Grant's management.

“He really enjoyed working with Peter Grant and is keen to link up with him again. We will have to wait and see though.”

Grant has not made any secret of the fact that he is looking for a new goalkeeper after using five last season. The club have been linked with several goalkeepers including free agents Neil Alexander and Danny Coyne. Tony Warner finished the season as City's No.1 but it is thought that Norwich could not afford to take on his Premiership wages.

However, Marshall has always been Grant's first choice and the Canaries have moved quickly to try and secure their man once the Celtic youth product demanded a move away from Parkhead.

Norwich club officials have remained tight-lipped over Marshall's possible move with chief executive Neil Doncaster preferring to keep the club's transfer dealings close to its chest.

“As and when we've got something positive to report we will do so,” he said earlier this week. “Some other clubs like to talk about what they are or are not going to do. We would rather do business privately.

“We understand a number of supporters find that stance frustrating, but we believe it's in the best interests of the club.”