A 6-year-old girl and her teenage sister are dead after the car they were in collided with a manure truck in Canyon County Thursday.

The crash on Old Highway 30 and Farmway Road, just east of Interstate 84 and about 15 miles north of Caldwell, was reported about 4:23 p.m., according to Idaho State Police.

The force of the impact of the crash killed 17-year-old Ashton Braden, who was driving, and her sister Sophie Moore, Canyon County Coroner Vicki DeGeus-Morris said Friday morning. The girls' 11-year-old sister, Zoey Moore, was airlifted to Saint Alphonsus Regional Medical Center in Boise with critical injuries, according to police. She'd been transferred to St. Luke's Boise Medical Center as of Friday evening.

The driver of the manure truck, Alberto Luna, and his passenger, Epigmenio A. Valenzuela, 38, of Nampa, were not injured, police said.

The crash is still under investigation but Idaho State Police released more information Friday on what happened.

There are stop signs on both sides of Farmway Road at the intersection but traffic does not stop on Old Highway 30.

Police say Ashton Braden was driving a 1992 Oldsmobile Cutlass southbound on Farmway and in the process of turning left on to Old Highway 30 when the car collided with the truck, which was going westbound on the highway, according to reports.

Emergency crews had to extricate Ashton Braden out the wreckage. Sophie Moore was also still in the car. It is unclear if Zoey Moore was inside when emergency crews arrived, officials said. Investigators are also still trying to figure out if the three girls were wearing seatbelts at the time of the crash.

ISP officials are reconstructing what happened during the crash and had not filed any charges as of 10 a.m. Friday.