CRANE LAKE, Minn. (AP) — Authorities say three people were injured, including one seriously, when a boat ran aground in the early morning hours on an island on a northern Minnesota lake.

Minnesota Public Radio reports that the crash happened at about 12:30 a.m. Saturday on Crane Lake in Voyageurs National Park.

The St. Louis County Sheriff's Office says a mechanical problem on the 24-foot boat caused the spotlight to stop working in the vicinity of Indian Island, about 2 miles northeast of the community of Crane Lake.

A 60-year-old woman who was in the boat's cabin at the time of the crash was seriously injured and transported to a Duluth hospital. The driver, a 37-year-old man, and a 65-year-old man suffered minor injuries.

Authorities say alcohol does not appear to be a factor.