Falkirk beat St Mirren 3-0 in the Ladbrokes Championship on Saturday to strengthen their grip on third place.
Craig Sibbald, John Baird and Will Vaulks scored against a Saints side who finished with nine men at the Falkirk Stadium after Jack Baird and Craig Reid saw red in the second half.
Gary Oliver bagged a double as Queen of the South hit back to defeat bottom club Alloa 2-1 at the Indodrill Stadium after Graeme Holmes had given the Wasps a first-minute lead.
Denny Johnstone scored a late winner as Morton triumphed 2-1 at Dumbarton, who had drawn level through Darren Barr after Joe McKee opened the scoring.
Livingston are up to seventh place after seeing off Raith Rovers 3-0 at the Tony Macaroni Arena thanks to a Jordan White double and a Declan Gallagher goal.
Hibernian play leaders Rangers at Easter Road on Sunday, live on Sky Sports at 12.30pm.