Hibernian remain two points clear at the top of the Ladbrokes Championship after a 1-0 win away to Dumbarton on Saturday.
A 32nd-minute penalty from Jason Cummings proved decisive at the Cheaper Insurance Direct Stadium as Neil Lennon's men made it five wins from five in the league.
Queen of the South are second following their 3-1 win over St Mirren in Paisley. Derek Lyle's double and a Stephen Dobbie goal saw Queens maintain their fine start to the season while Saints, who scored through Tom Walsh, are now bottom of the table.
Dundee United goalkeeper Cammy Bell enjoyed a remarkable afternoon as he saved three first-half penalties in a 3-1 win at Dunfermline. Bell denied Gavin Reilly, Nicky Clark and Paul McMullan as a Tony Andreu double and a Simon Murray goal saw the visitors take all three points despite Paul Dixon being sent off. Michael Paton netted a consolation for the Pars.
Goals in either half from John Baird and Tom Taiwo saw Falkirk win 2-0 at Stark's Park to end Raith Rovers' unbeaten start to the season.
Ayr United moved off the bottom, and also leapfrogged Morton, with a 2-1 victory over Jim Duffy’s men at Somerset Park. Paul Cairney and Alan Forrest scored for the Honest Men but Ross Forbes pulled one back despite Mark Russell's red card.