Airdrie United closed to within a point of second-placed Raith Rovers thanks to a great second half performance.
Darren Smith put the home side in front on 50 minutes, racing in to fire an angled shot high into the net.
Brian Prunty made it two 18 minutes later when he reached the ball first, skipped over the goalkeeper's challenge and stroked the ball home.
Allan Russell sealed the victory with 15 minutes left as he took advantage of some uncertain defending.
Airdrie Utd: Robertson, McKenna, Lovering, McDonald, Smyth, Donnelly, Smith, Andreoni (Holmes 85), Russell (Watt 89), Noble, Waddle (Prunty 46). Subs Not Used: Campball, Hollis.
Booked: Lovering, Prunty, Andreoni.
Goals: Smith 50, Prunty 68, Russell 75.
Raith Rovers: Renton, Wilson, Dingwall, Campbell, Andrews, Sloan, Borris (Carcary 67), Henderson, Hislop (Tod 79), Goodwillie (Weir 67), Graham Templeton. Subs Not Used: Winter, Fahey.
Booked: Dingwall, Henderson.
Ref: W Hornby
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