SIOUX FALLS, S.D. (KELO.com) -- Explosions and their aftermath have been seen and heard in and around Minnehaha county.
The Minnehaha County Sheriff's Department reports seven explosions seen and heard over this last weekend, with the explosions ending on Monday the 13th.
Various items were targets, including mailboxes and the fishing hours sign at the Baltic River Park.
Agencies assisting in the investigation include United States Postal Inspector and Alcohol, Tobacco, and Firearms.
The Sheriff's department says they are considering the explosions as related.