Ross County have signed Jason Naismith from St Mirren and brought in former Motherwell and Coventry winger Jim O'Brien.

Right-back Naismith has moved immediately to Dingwall for an undisclosed fee after signing a pre-contract deal earlier this month. The 22-year-old comes in 24 hours after Erik Cikos departed.

O'Brien has signed on a loan deal from Shrewsbury which runs until the end of the season.

County manager Jim McIntyre told his club's official website: "We've been tracking Jason's progress for a while now and I'm delighted to secure his services on a permanent deal. He is an exciting young prospect and will be a great addition to the squad.

"I've worked with Jim O'Brien before at Dunfermline so I know his qualities. He will bring competition in wide areas for us and at 29 years-of age he brings a wealth of experience with him."