Leaders of all 27 European Union member states will convene for an extraordinary summit later this week in response to President Donald Trump’s escalating pressure campaign to acquire Greenland, European Council President António Costa announced Sunday.

Costa said he called the meeting due to the “significance of recent developments,” as European governments mobilize against Washington’s latest measures.

Trump announced Saturday that the United States will impose a 10% tariff on all goods imported from eight NATO allies — Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands and Finland — following their participation in recent military exercises in Greenland. The tariffs are scheduled to take effect on February 1 and rise to 25% on June 1. Trump said the measures will remain in place until the United States succeeds in purchasing Greenland.

Greenland is a self-governing territory within the Kingdom of Denmark. Trump first proposed acquiring the mineral-rich Arctic island during his first term, an idea consistently rejected by Danish and Greenlandic officials.

Costa said recent discussions with European leaders reaffirmed a “strong commitment” to international law, Arctic security through NATO, and solidarity with Denmark and Greenland in the face of continued U.S. pressure.

He added that EU leaders agree tariffs would undermine transatlantic relations and violate the spirit of the EU-U.S. trade framework, stressing the bloc’s “readiness to defend itself against any form of coercion” while remaining open to “constructive engagement with the United States on issues of shared interest.”

An EU Council spokesperson confirmed the summit will be held in person in Brussels.