01/07/15 2:00pm
01/07/2015 2:00 PM
 Plum Island (Credit: file)

Plum Island. (Credit: Times/Review, file)

An advocacy group is threatening a lawsuit against two federal agencies in the latest attempt to halt the public sale of Plum Island, claiming officials have failed to protect endangered species inhabiting the isle.

Connecticut Fund for the Environment, along with the Long Island version Save the Sound, issued notice Monday to the Department of Homeland Security and the General Services Administration — the two agencies that oversee the island — of an intent to sue under violation of the Endangered Species Act.

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