Plan for some major delays Monday morning if you're traveling southbound on Interstate 15 in American Fork.

Officials have closed the left lanes as they investigate what they're calling a crash.

Details of the crash are not yet available. Sgt. Roden with Utah Highway Patrol told 2News that someone may have jumped from the overpass onto Interstate 15. An investigation is still ongoing and nothing has been confirmed at this time.

Officials are currently waiting for the medical examiner to arrive on the scene.

Two or three of the right lanes on southbound Interstate 15 are open but traffic remains severely backed up.

Avoid the area if you can.

This is a developing story.