Five weekend fires in northern Minnesota have been classified as arson cases, the Hubbard County Sheriff's Department said Thursday.
All of the fires occurred along the Highway 34 corridor in the early hours of Saturday.
The fires involved four unoccupied homes and one unattached shed.
A reward of up to $2,500 for information leading to the arrest and conviction of the person or people responsible is being offered through the Minnesota Arson Reward Project.
Besides the Hubbard County Sheriff's Department, other agencies involved in the investigation include the Cass County (Minn.) Sheriff's Department, the Akeley and Nevis police and fire departments, and the Minnesota State Fire Marshal's Office.
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Anyone with information about the fires is asked to call (800) 723-2020 or their local law enforcement agency.