Three teenagers were thrown from a car and seriously injured Thursday night in Assumption Parish after the car veered off La. 70, spun and flipped over, Louisiana State Police reported Friday.

State troopers said they are trying to determine who was driving the 2014 Nissan Sentra. That person faces possible criminal counts pending an ongoing investigation into the crash, said Trooper Evan Harrell, spokesman for State Police Troop C.

Alaina Landry, 18, Pierre Part; Brandy Landry, 17, Labadieville; and Katie Metzler, 18, Pierre Part, were in the Sentra headed westbound on two-lane La. 70 shortly before 9 p.m. about 2 miles west of La. 1 between La. 996 and La. 1004, Harrell said.

The Sentra had just passed another car in a curved section of the road that had a no-passing zone and made a quick, evasive move back into the westbound lane. But the car kept going off the highway and into a ditch near an electrical substation, troopers said in a news release.

The teens, who were not wearing seat belts, were thrown from the car as it turned over in the ditch, troopers said.

Troopers said speed was a factor in the crash. Alcohol use is unknown at this time, troopers said.