The United States and 12 allies issued what amounted to a final warning to Houthi rebels on Wednesday to cease their attacks on vessels in the Red Sea or face potential targeted military action, Paralel.Az reports citing Associated Press.

The Yemen-based militants have carried out at least 23 attacks in response to the Israel-Hamas war in Gaza since Dec. 19.

A senior Biden administration official declined to detail rules of possible engagement if the attacks continue, but underscored that the Iranian-backed Houthis should “not anticipate another warning” from the U.S. and its allies.

The official, who spoke on the condition of anonymity under ground rules set by the White House, spoke soon after the countries issued a joint statement earlier on Wednesday condemning the attacks and underscoring that international patience was strained.

The statement was signed by the United States, Australia, Bahrain, Belgium, Canada, Denmark, Germany, Italy, Japan, Netherlands, New Zealand, Singapore and the United Kingdom.