Celtic beat St Mirren 4-0 at the SMISA Stadium in Paisley thanks to a first-half strike from Tom Rogic and a three-goal burst late in the game from top scorer Odsonne Edouard (penalty), Ryan Christie and David Turnbull.
In the earlier match, Motherwell defeated Kilmarnock 1-0 at the BBSP Stadium, Rugby Park, with a goal from Allan Campbell after 71 minutes.
Livingston v Hamilton Accies was postponed due to snow while the Championship match between Inverness CT and Alloa Athletic was called off because of a frozen pitch.
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