Morton defeated Dunfermline 2-0 at Cappielow to move to within two points of the League 1 summit.
Ross Caldwell and Peter MacDonald scored in the second half as the Pars' promotion hopes took another knock.
Leaders Stranraer drew 1-1 with Airdrie at the Excelsior Stadium. Jon McShane scored late on for the Blues but Jim Lister levelled in the last minute.
Second-placed Forfar beat bottom club Stirling Albion 1-0 at Forthbank. Gavin Malin got the only goal just before the break and the Binos had Chris Smith sent off in 46 minutes.
Stenhousemuir stay just ahead of Ayr United after a 1-1 draw at Ochilview. Paul McMullan scored for the Warriors but Alan Forrest equalised before the break.
The game between Brechin and Peterhead at Glebe Park was postponed due to a frozen pitch.
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