Fedex B772 near Whitehorse on Sep 4th 2014, cabin fire indication

A Fedex Federal Express Boeing 777-200, registration N880FD performing freight flight FX-195 from Memphis,TN to Anchorage,AK (USA), was enroute at FL400 about 140nm south of Whitehorse,YT (Canada) when the crew received a cabin fire indication, declared emergency, descended the aircraft to FL250 and diverted to Whitehorse for a safe landing on runway 32L about 45 minutes later and stopped on the runway. Attending emergency services found no trace of fire, heat or smoke. The aircraft vacated the runway about 80 minutes after landing.