ELY TOWNSHIP, Mich. (AP) — Police say two people are dead following a small plane crash near a grassy runway in Michigan’s Upper Peninsula.

State police say in a statement that the two-seat Aeronca 11AC with two people aboard crashed Monday night in Marquette County’s Ely Township.

In a statement, police identified the men as 49-year-old Dean Honkala of Ishpeming and 48-year-old William Brewer of Ishpeming. They say it wasn’t immediately clear who was piloting the plane. Police say the cause of the crash is listed as undetermined for now.

Police say the Federal Aviation Administration and the National Transportation Safety Board on Tuesday plan to be at the scene of the crash to investigate.