Thieves have stolen three bronze plaques from a memorial in St. Johns Marsh, a 3,000-acre conservation area near the northern end of Lake St. Clair.
The plaques were installed two years ago to honor people who saved the marsh in St. Clair County's Clay Township, about 35 miles east-northeast of Detroit.
The Times Herald of Port Huron says the theft was discovered January 24 by Ralph Kandt, a leader of the conservation effort who helped install the markers on the field stone memorial. It's suspected the thieves wanted the metal for scrap.
A committee raised $40,000 two decades ago to buy 40 acres of the marsh. The Michigan Department of Natural Resources bought the rest.