President Trump announced tariffs on several countries, including the uninhabited Heard and McDonald Islands, as part of a global trade war.
The islands, managed by Australia, are a World Heritage Site known for its penguin and seabird populations. They are claimed by Australia despite the Antarctic Treaty prohibiting territorial ownership.
Trump's announcement included a poster and sheets of paper listing targeted countries and the purported tariffs, indicating a 10% tariff on the islands for alleged "currency manipulation and trade barriers."
Australia's Antarctic Division and Department of Foreign Affairs and Trade did not immediately respond to inquiries. An expert commented that this action could be in breach of the Antarctic Treaty.
The Antarctic Treaty promotes international scientific cooperation and peaceful use of the continent. However, Australia has claimed the Heard and McDonald Islands since 1953 and established a large marine reserve around them.