Four people from Menominee, Wisconsin, were killed Saturday when their single-engine Cessna 180G crashed near Trilla, Illinois, after reportedly hitting powerlines.

The victims—Ross Nelson, Raimi Rundle, Courtney Morrow, and Michael Morrow—were pronounced dead at the scene.

The crash is under investigation by the NTSB and FAA, focusing on the pilot, aircraft, and environmental factors, ABC News has reported.

A final report on the cause is expected within 12 to 24 months.

Written by B.C. Begley