Authorities say a mother and her 14-year-old son have died after a collision in northwest Nebraska’s Sheridan County.

The collision occurred around 7:30 p.m. Friday, about 3 miles (5 kilometers) west of Rushville on U.S. Highway 20. Sheridan County Attorney Jamian Simmons says a westbound vehicle was struck by an eastbound vehicle driven by 31-year-old William Hilton, who was trying to pass a semitrailer.

Simmons says the crash killed 46-year-old Lynell Cash, of Hay Springs, and her son Waylon Cash and injured another family member, who has not been named. Hilton also was injured.

The collision is being investigated.