Calum Gallagher (number nine) doubled the hosts' lead and ultimately scored the winner
Airdrieonians consigned Inverness Caledonian Thistle to a third defeat out of three in the Scottish Championship.
Caley Thistle, who reached last season's Scottish Cup final, fell behind to a first-minute Cameron Harper own goal.
Calum Gallagher struck Airdrie's second before half-time.
The home side lost Adam Frizzell to a second yellow card and Nathan Shaw's shot reduced the visitors' deficit.
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