The European Union on Monday said it is preparing “countermeasures” against the United States after the Trump administration’s surprise tariffs on steel rattled global markets

The European Union is preparing “countermeasures” against the United States if the two sides cannot reach a deal after surprise U.S. tariffs on steel rattled global markets and complicated the ongoing negotiations between Brussels and Washington.

The European Union said it is preparing “countermeasures” against the U.S. following President Donald Trump’s unexpected announcement that he would increase his tariffs on steel. EU Commission President Ursula von der Leyen and Trump last week agreed to “rapidly” begin on a trade deal.