Rangers continued to set the pace in the Scottish Premier League with a 4-0 win at Dunfermline on Saturday, while Celtic also won.
Steve Naismith netted a brace and Carlos Bocanegra and Maurice Edu also scored at East End Park to help Rangers maintain their four-point advantage atop the league standings.
Celtic kept up the pursuit of their Glasgow rivals after Joe Ledley and James Forrest scored to give Neil Lennon's men a comfortable 2-0 home win over bottom-placed Inverness.
Third-placed Motherwell kept in touch with the leaders as Robert McHugh scored late for a 1-0 win over Aberdeen.
St Mirren were comfortable 3-0 home winners over Kilmarnock thanks to a Paul McGowan double and a goal from substitute Nigel Hasselbaink.
And Hibernian played host to an entertaining 3-3 draw with Dundee United at Easter Road.
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