FARR WEST, Utah (ABC4) – All northbound lanes were closed on I-15 in Farr West near North Ogden on Wednesday morning after a fatal crash involving a car and a semi-truck. The interstate has since been reopened.

Utah Highway Patrol said the crash happened just before 3 a.m. on the interstate at milepost 349 near 2700 North in Farr West. After a preliminary investigation, police believe the semi-truck rear-ended the car after coming up over a rise on the interstate.

Utah Highway Patrol Lt. Justin Cheney said it appears the car may have hit a deer and moved over to the right-hand lane with no lights on. The semi-truck reportedly did not see the car when coming over the hill. Police are not sure if the impact with the deer disabled the car or its lights.

Police said three people sitting in the backseat of the car have died as a result of the accident. The other two people in the front seat were taken to the hospital in critical condition. A medical helicopter responded to the scene.

Utah Highway Patrol said two of the people who died were from Enid, Oklahoma. One was a 70-year-old man and the other was a 64-year-old woman. The third person to have died has been identified as a 17-year-old teenage girl from the Marshall Islands.

All northbound lanes were closed on I-15 and traffic was being diverted off the interstate at 2700 North. Commuters were encouraged to take US-89 as an alternate route.

The northbound lanes were closed for “several hours” as emergency crews worked to clean up the crash. The freeway has since been reopened.