KERRICK, Minn. (AP) - Authorities are searching for a missing duck hunter who was last seen in a northern Pine County lake.

The man, who's in his late 50s, went missing shortly after 9 a.m. Thursday when he was hunting with his son and a friend on Oak Lake, near Kerrick. Authorities say the son and friend had gone to grab the truck so they could take the boat out of the water, and the boat was running in circles with no one on board when they returned to the boat launch.

Authorities believe the man fell out of the boat and wasn't wearing a life jacket.

About 30 people from multiple agencies searched for the man Thursday. The search is expected to resume Friday morning.

The man's name hasn't been released.