Authorities identified two men who disappeared and are presumed dead after their aircraft vanished over Lake Michigan Sunday.

They are Emanuel Z. Manos, 53, of Monroe, and Randal S. Dippold, 65, of Perry.

State police were still looking for wreckage from the plane Wednesday on Lake Michigan off the coast of Frankfort and Benzie County Sheriff’s officials asked that anyone who is on Lake Michigan or its shore and encounters something that could be aircraft wreckage to call them at 231-882-4487.

Authorities learned from air traffic control that the single-engine red and white Bonanza en route from Ontonagon to Monroe experienced engine trouble Sunday evening and had been directed to the nearest airport, in Frankfort. The plane disappeared from radar once it descended below 1,000 feet.

The plane’s tail number is N1561Z, and it is registered to Evergreen Exploration Company.