The St. Cloud Fire Department needs your help finding the cause of a grass fire.

Fire Marshal Michael Post says an April 29 grass fire near the Minnesota Correction Facility leads investigators to believe the fire was not natural. St. Cloud Police and the D-N-R were unable to find a natural cause for the fire.

If anyone has information on how the fire started or who was involved, no matter how insignificant, you can call the Minnesota Arson Reward project Arson Hot Line at 1-800-723-2020. Submissions can also be anonymous.