Airdrieonians beat Lanarkshire rivals Motherwell 2-0 at the Penny Cars Stadium to go second in Group F. Superb second-half strikes from Rhys McCabe and Scott McGill earned the Diamonds an impressive victory.
In Group C, Dundee lead the way after a 2-0 victory over Montrose at Links Park while Ross County were 1-0 winners away to Brora Rangers.
Raith Rovers are top of Group D after their 0-0 draw with Livingston at the Tony Macaroni Arena although Livi won the penalty shoot-out bonus point.