One person was killed and another seriously injured in a one-vehicle crash that occurred early Saturday, Jan. 1, in Monroe County.

State police at Fern Ridge said Crystal M. Staber, 20, of Lebanon, was southbound on Toll road, a quarter-mile north of Laurel Road, in Effort, Chestnuthill Township, about 6 a.m. when, for unknown reasons, her vehicle left the roadway along the berm and struck several trees. The vehicle ended up on the east side of the road in a ditch facing west.

A passenger, Brandon L. Oblinsky, 26, also of Lebanon, was pronounced dead at the scene. Staber was injured and flown by Medevac helicopter to the Lehigh Valley Hospital, Salisbury Township, and admitted in critical condition.

The investigation into the crash is continuing, troopers added.