Rescuers searched on Friday for any sign of a plane that went missing while carrying 10 people across Alaska’s Norton Sound south of the Arctic Circle. The Bering Air Caravan was heading from Unalakleet to Nome on Thursday afternoon with nine passengers and a pilot, according. Authorities were working to determine its last known coordinates.

Unalakleet is a community of about 690 people in western Alaska, about 240 km southeast of Nome and about 640 km northwest of Anchorage. The disappearance marks the third major incident in US aviation in eight days.