WASHINGTON (AP) — The Food and Drug Administration has halted operations at a Delaware cheese plant after an outbreak of listeria linked to the company’s cheese killed one person and sickened seven others.

This is only the second time the FDA has used its authority to shut down a plant after gaining that authority in a 2011 food safety law. The agency said Tuesday that its inspectors found unsanitary conditions at Roos Foods in Kenton, Del., including a badly leaking roof, rusting and deteriorating equipment and food residues on equipment even after it had been cleaned.

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