Allan Russell scored four goals as Airdrie ran riot against Arbroath at the Excelsior Stadium.
Allan Russell (left) cut through Arbroath's defence to hit four goals
Russell opened the scoring in 15 minutes with an angled shot past Arbroath goalkeeper Scott Morrison.
Kevin McDonald made it two 11 minutes later when he collected Graeme Holmes' pass before firing home.
Paul Tosh pulled one back for the visitors before Russell scored in the 61st minute and added two more before Arbroath's Steven Rennie was sent off.