VIDEO: Authorities say an unidentified chemical has rained down on a northeast Marion neighborhood. Several people called 911 Tuesday night after noticing a white substance on vehicles and houses. No injuries have been reported. Officials initially thought the substance may be a weed killer accidentally dropped by a crop-duster. But Marion Fire Chief Deb Krebill said Wednesday afternoon the substance may be a fungicide that's also sprayed on crops. Iowa State Extension agronomist Meghan Anderson says that, to be extra cautious, people in the area should destroy any produce in their gardens. Authorities are still investigating.