The 24-year-old moved to Tractor Sazi in Iran last summer but did not last a full season in the Persian Gulf Pro League.

He played just six matches during an unhappy time in the Middle East, scoring four goals.

The Dingwall side have also signed goalkeeper Jack Ruddy on a six-month deal after he was released by Wolves.

The 21-year-old Scot began his career with Rangers before moving to Spain with Real Murcia.

He joined Bury in 2014 before a three-year stint at Molineux that included loan spells with Oldham, Ayr United and Spanish sides Jumilla and Reyes.

"We see him as a hungry goalkeeper looking to make his mark," said co-manager Stuart Kettlewell.

After Scott Fox left at the end of last season, County signed Ross Laidlaw from Hibs and brought in Nathan Baxter, but the on-loan Chelsea goalkeeper will miss up to four months after a shoulder operation.

On the arrival of Erwin, Kettlewell said: "Lee gives us a different dimension and managing to get a player of his quality in is fantastic for the club.

"Given his experience in the Premiership with Motherwell and Kilmarnock we know he is capable of playing at this level and its about making sure we can get him playing at his best here.

"He knows what it takes to work your way to the top and we fully expect him to work his way to his best here and try and compete for a position in the starting eleven."

Erwin left Motherwell under freedom of contract to join Leeds United in the summer of 2015.

However, he failed to make an impact at Elland Road and spent time on loan with Bury and Oldham Athletic before joining Kilmarnock in 2017.

The 6ft, 2in forward scored eight goals in 45 appearances during his 13 months at Rugby Park.

Jack Ruddy played 13 games on loan at Ayr United in early 2018