Jordan White scored the only goal six minutes from time as Ross County beat St Mirren 1-0 in Dingwall to move up to eighth place in the cinch Premiership table.
Craig Wighton grabbed a double as Dunfermline Athletic saw off Arbroath 3-0 at East End Park to move into the top four in the cinch Championship.
Falkirk's lead at the top of cinch League 1 is now just one point after they were held to a 0-0 draw at Montrose while title rivals Hamilton Accies defeated Annan Athletic 2-1 at Galabank.
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