Celtic moved 18 points clear at the top of the Scottish Premier League after they beat nearest rivals Inverness Caledonian Thistle 3-1.
Kris Commons, Rami Gershon and Miku all scored for the Hoops as they underlined their superiority in this division.
Former Manchester City player Willo Flood grabbed a goal in Dundee United's 3-1 win over 10-man Hearts.
Fraser Kerr and Keith Lashley also saw red in the final five minutes for Motherwell as Kilmarnock beat the third-placed side 2-0.
In the other fixture, Aberdeen and St. Mirren played out a goalless draw at Pittodrie.
Results in full: Inverness Caledonian Thistle 1-3 Celtic, Aberdeen 0-0 St. Mirren, Dundee United 3-1 Hearts, Kilmarnock 2-0 Motherwell
