President Donald Trump said the U.S. would hold Iran responsible for any future attacks by the Houthis. Trump's threat comes after the U.S. launched a new wave of airstrikes against the Houthis over the weekend.

The statement comes after Trump on Saturday ordered air and naval strikes against the Houthis in Yemen in retaliation for the Houthis’ attacks in the Red Sea, marking the most significant military action of his second term and killing at least 53 people and injuring 98 others, ABC reported, citing the Ministry of Health in Sana’a, Yemen.

U.S. President Donald Trump said on Monday he would hold Iran responsible for any attacks carried out by the Houthi group that it backs in Yemen, as his administration expanded the biggest U.S. military operation in the Middle East since Trump returned to the White House.