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Kyle Letheren could require an operation to repair knee cartilage damage

Dundee's Kyle Letheren has been ruled out through injury for up to eight weeks, leading manager Paul Hartley to launch a search for a new goalkeeper.

The 26-year-old Welshman picked up a knee injury in the warm-up before Saturday's 3-1 win away to Motherwell.

It is feared that Letheren may now need an operation and he will see a specialist on Monday.

Hartley is looking for cover in the short term and told BBC Scotland: "I'm working on something just now."

Scott Bain, who arrived from Alloa Athletic in the summer, made his Dundee debut on Saturday

Scott Bain, who impressed Hartley while playing against the Dark Blues in the Scottish Championship last season and played under him at Alloa, made his Dundee debut when deputising for Letheren at Fir Park.

The 22-year-old, who began his career with Aberdeen, moved to Dens Park in the summer on a three-year contract after spending three years with the Wasps.

However, Hartley has decided he requires another goalkeeper in his squad after a scan revealed that Letheren, who joined Dundee after leaving Kilmarnock in summer 2013, suffered cartilage damage.

Dundee had also signed former Rangers, St Mirren and Cowdenbeath goalkeeper Grant Adam in the summer after he left Airdrieonians.

The 23-year-old former Scotland Under-21 international subsequently left at the end of his short-term deal in September, after which a move to Alloa fell through.