A dramatic injury-time winner from Andrew Barrowman earned Ross County a thrilling top-of-the-table victory.
Airdrie's Kevin McDonald rammed home the rebound after Tony Bullock saved Stuart Noble's penalty kick.
Barrowman then slotted home a Sean Higgins pass and Stuart Golabek fired County ahead on 55 minutes.
The visitors equalised three minutes later with a Noble header but County snatched the points when Barrowman rose to head home a Stewart Petrie cross.
Ross County: Bullock, Miller, Golabek, Dowie, Keddie, McCulloch, Scott, Strachan, Shields (Gunn 70), Barrowman, Higgins (Petrie 77). Subs Not Used: Malin, Moore, Brady.
Booked: Keddie, Shields, Miller, Higgins.
Goals: Barrowman 25, Golabek 55, Barrowman 90.
Airdrie Utd: Robertson, McKenna, Lovering, McDonald, Smyth, Donnelly, McDougall (Smith 46), Andreoni, Russell (Prunty 49), Noble, Waddle. Subs Not Used: Hollis, Watt, Craig.
Booked: Lovering, Smyth.
Goals: McDonald 1, Noble 58.
Ref: S Finnie