GLENNS FERRY - Idaho State Police says a 79-year-old woman was killed on Interstate-84 Thursday.

Authorities say at 1:18 p.m. on Thursday deputies responded to a two-vehicle crash westbound on Interstate 84 at milepost 117.5, near Glenns Ferry.

Officials say Gayla Sanford, 79, of King Hill was traveling westbound in a 2000 Pontiac Grand Am, when for unknown reasons her vehicle drifted off the right shoulder of the roadway.

Sanford then over-corrected, came back onto the roadway sideswiping a motor home, driven by Samuel Lee, 66, of Edmonds, Wash. This caused Sanford's vehicle to hit a concrete wall and roll several times. Sanford was not wearing a seatbelt and was ejected from the vehicle. Sanford was pronounced dead at the scene.

The occupants in the motor home were not injured. The crash is still under investigation.