Marc Kelly scored a last-minute winner as Hamilton Accies beat Dunfermline 2-1 on Tuesday to move to the top of the Development League.
David Hopkirk gave the Pars an early lead but Andy Ryan equalised before the break and Kelly came off the bench to claim all three points for the visitors.
St Johnstone slipped to second in the table after losing 1-0 to Inverness CT at the Tulloch Caledonian Stadium - Dani Lopez scored the only goal of the game.
Celtic, who have four games in hand and didn’t play this week, are third while St Mirren are fourth after beating Hibernian 3-1 at Renfrew. Lewis McLear, Kyle McAllister and Lewis Morgan scored for Saints, with Oliver Shaw netting for Hibs.
Partick Thistle enjoyed a 6-2 win against Hearts at Ochilview. Kevin Nisbet scored twice, with Michael McMullin, Declan McDaid, Neil McLaughlin and Leon Jones (og) also on target for the Jags. Russell McLean and Jones scored for Hearts.
Ross County notched up a 4-0 victory over Rangers at Ochilview thanks to goals from Russell Dingwall (2), Darren Moffat and Chris McLaughlin - all of them in the first half.
Kilmarnock enjoyed a 5-0 win against Dundee at Rugby Park, with goals from Scott McLean (2), Dale Carrick, Jack Whittaker and Lewis Morrison.
Motherwell beat Falkirk 3-1 at the Excelsior Stadium - Dylan Mackin (2) and Dom Thomas scored for Well, with Kevin O'Hara on target for the Bairns.
Stirling Albion are four points clear in the SPFL Development League East after beating Forfar 3-2 at Station Park.
Morton, whose game with Queen's Park was postponed, are four points ahead of Ayr United and Airdrieonians in the Development League West.