Investigators from the Oregon State Police said today that the driver of a pickup truck that crashed on Interstate 84 near Baker City Saturday night, leading to the death of one passenger, struck an elk, causing the driver to lose control.

Tanda Kay Pratt, 60, of Blackfoot, Idaho, died in the crash that happened about 10:38 p.m. Saturday near Milepost 294, about 10 miles north of Baker City.

The driver, Todd B. Pratt, also of Blackfoot, was injured, as were the two other passengers, Joe L. Pratt, 61, of Blackfoot, and Austin B. Parker 23, of Pocatello, Idaho.

A 60-year-old Idaho woman died Saturday night in a single-vehicle crash on Interstate 84 about 10 miles north of Baker City in which three other people were also injured.

Tanda Kay Pratt, of Blackfoot in Eastern Idaho, was pronounced dead at St. Alphonsus Medical Center-Baker City Saturday night, according to the Oregon State Police.

The accident happened about 10:38 p.m. A 2010 Ford F350 pickup truck hauling a camp trailer veered into the freeway median, and both vehicles rolled, according to OSP. The driver was Todd B. Pratt, 30, also of Blackfoot.

There were two other passengers in addition to Tanda Pratt -- Joe L. Pratt, 61, of Blackfoot, and Austin B. Parker, 23, of Pocatello, Idaho. Joe Pratt and Todd Pratt were both taken by air ambulance to St. Alphonsus Hospital in Boise. Parker was taken by ground ambulance to the Baker City hospital.

OSP is investigating the cause of the accident, which closed the westbound lanes of the freeway temporarily.