Celtic increased their lead at the top of the Ladbrokes Premiership to 16 points with a 2-0 home win over Ross County on Wednesday night.
Erik Sviatchenko broke the deadlock from long range after 38 minutes and Stuart Armstrong grabbed the second goal before half-time.
Second-placed Rangers were held to a 1-1 draw by St Johnstone at McDiarmid Park despite going ahead through Barrie McKay midway through the first half. Steven MacLean seized on a defensive error to equalise five minutes later for Tommy Wright's team.
Partick Thistle moved into the top six thanks to a 2-0 victory over Dundee at Firhill - Callum Booth and Kris Doolan netted in the first half.
Motherwell were 2-1 winners away to bottom club Inverness CT. All the goals came in the second half, with Craig Clay and Scott McDonald scoring for the Steelmen before Greg Tansey pulled one back.