Fire destroys boats and dock on Minnesota lake, cause of fire unknown.

Three boats and a dock have been destroyed by fire on Lake Minnetonka's Lafayette Bay.
The Hennepin County Sheriff's Office says one boat caught fire in the bay Sunday afternoon. KMSP-TV says all those onboard were able to safely get off the boat, which drifted into a dock where two other boats caught fire.
Authorities don't know what started the fire on the first boat.