Authorities say a woman was killed when her southbound vehicle left Highway 141 and crashed into a tree Sunday morning.

POLK COUNTY, Iowa — The Polk County Sheriff's Office is investigating a fatal single-car accident that killed one person Sunday morning. Deputies were called to the 12100 block of Highway 141 just before 9 a.m. where the accident was reported. Once on the scene, officials found a vehicle in a west ditch where they said it had hit a tree.