A 28-year-old man was killed and a 22-year-old woman was seriously injured when a car driving the wrong way on I-15 in Utah County collided with a second vehicle on Tuesday night.

At 11:35 p.m., the Utah Highway Patrol received reports of a vehicle traveling northbound in the southbound lanes of I-15 at mile marker 273 in Lindon. Shortly thereafter, two cars collided.

According to a news release from UHP, the man was not wearing a seatbelt and was “likely killed on impact.”

The man was identified as Teke Joseph Grondel, 28, of Plain City.

The woman was taken to a local hospital in serious condition.

UHP has a “pretty good idea” which driver was going the wrong way, but has not released that information as it continues to investigate the crash.