The message from the Trump administration is that the wind turbines can disrupt radar systems and mislead US defenses. They now want to begin negotiations with affected wind turbine operators and states to address the security risks, the US Department of the Interior says in a statement.
Earlier in December, a federal judge overturned the Trump administration's decision to ban new offshore wind farms.
The projects affected are Vineyard Wind 1, Revolution Wind, Sunrise Wind, Coastal Virginia and Empire Wind 1.
The announcement sent wind power stocks generally lower, including Danish Ørsted and wind turbine manufacturer Vestas Wind Systems.
Ørsted's shares fell sharply after the announcement. When the Copenhagen Stock Exchange closed on Monday, the price had fallen 12.7 percent.
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