Five bald eagles have been found dead in Michigan's Upper Peninsula, prompting an investigation by wildlife officials who have ruled out natural causes for the deaths.

Authorities suspect the eagles may have been illegally killed, raising concerns about potential poaching activity in the region. The investigation is ongoing as officials work to determine the exact cause of death and identify any responsible parties.

Bald eagles, once endangered due to DDT pesticide use, have made a significant recovery since the chemical was banned in 1972. The species was removed from the federal endangered species list in 2007, though they remain protected under federal law.

Killing bald eagles is a federal crime under the Bald and Golden Eagle Protection Act, with penalties that can include fines up to $100,000 and prison sentences. The law protects both living eagles and their parts, nests, and eggs.

Wildlife officials have not released additional details about where specifically the eagles were found or the timeline of the discoveries. The investigation continues as authorities work to piece together the circumstances surrounding the deaths.