A woman was killed in a single-vehicle crash early Monday in northwest Indiana.

The crash happened about 3 a.m. at West 241st and Wicker avenues in Schneider, according to the Lake County sheriff’s office.

Nancy Krpf, 35, was driving a 2005 Chrysler Town and Country south on Wicker Avenue when the van went off the road to the east, re-entered the roadway, went off the road to the west, and rolled over, according to the Lake County coroner’s and sheriff’s offices.

Krpf, who was the driver and only occupant of the van, suffered blunt force trauma and was pronounced dead at the scene, according to the authorities said. She lived in Lowell, Indiana.

The cause of the crash remains under investigation, according to the sheriff’s office.