BOISE -- A woman was killed Sunday when she lost control of her car and crashed into a parked semi trailer in Boise.

Idaho State Police say the wreck happened at 5:12 p.m. on Simco Road, just south of I-84.

According to investigators, 51-year-old Olga Ferguson was driving north on Simco Road when she drove off the edge of the street, slamming into a semi parked in a nearby dirt lot.

Ferguson's car came to rest in a field along the roadway. She died from her injuries at the scene.

Police say the woman was wearing a seatbelt when the crash happened. It's unclear what caused her to drive off the road.

The wreck remains under investigation.