A Washington state woman and her unborn child were killed Tuesday morning when her car veered into oncoming traffic on U.S. Highway 97 and hit a truck head-on, according to a news release from the Deschutes County Sheriff’s office.

Jessica Lynn Shadle, 19, of Omak, Wash., was driving a Chrysler PT Cruiser northbound on Highway 97 south of Wickiup Junction when her car veered into the southbound lane and hit a truck carrying a load of apples.

Officials don’t know why the car veered, said Sgt. Gary Cima with the Sheriff’s Office.

”At this point we’re trying to figure that out, trying to figure out how she ended up directly in line with that semi truck,” Cima said.

The highway had some wet patches, but he said the temperatures were in the 40s and there was no ice on the road.

The driver of the truck, Joe Allen Kallis, 40, of Auburn, Wash., was not injured. Cima said that Kallis reported that Shadle’s car appeared suddenly in front of him before the crash.

The force of a truck carrying more than 70,000 pounds of apples hitting a passenger car at highway speeds completely totaled the car, Cima said.

The passenger car spun off the roadway and ended up on the northbound shoulder, while the truck went off the roadway and hit some small trees, according to the release.

The La Pine Fire Department responded and extricated Shadle from the vehicle. Shadle, who was five months pregnant, and her unborn child died at the scene from injuries due to the crash, according to the statement from the Sheriff’s Office.

The drivers of both vehicles were wearing seat belts, the statement said.

The crash closed the highway for approximately 2 1/2 hours. The Oregon Department of Transportation responded and helped with traffic control.

The Sheriff’s Office and Oregon State Police are still investigating the accident, following every lead and looking for witnesses to the wreck, Cima said.

”It’s a tragedy is what it is,” he said.