MISSOULA, Mont. (AP) — Officials in northwestern Montana say a man is missing and presumed drowned after falling off a boat in Middle Thompson Lake, about 45 miles southeast of Libby.

The Lincoln County sheriff's office tells KECI-TV (http://bit.ly/1rN7fYd ) the man fell off the boat on Saturday.

Search and Rescue teams and a helicopter were unsuccessful in their efforts to find the man on Sunday.

The man's name, age and hometown haven't been released.