By TARA COPP, LOLITA C. BALDOR and JON GAMBRELL Associated Press
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WASHINGTON (AP) — Defense Secretary Lloyd Austin said Thursday it’s time to further disable Iran-backed militias that have struck at U.S. forces and ships in the Middle East and the U.S. is preparing to take significant action in response to the deaths of three U.S. service members in Jordan.

For days the U.S. has hinted strikes are imminent. While the threat of retaliation for Sunday’s deaths has driven some militant groups to say they were stopping hostilities, as late as Thursday Yemen’s Houthi rebels were still attacking vessels and fired a ballistic missile at a Liberian-flagged container ship in the Red Sea.

“At this point, it’s time to take away even more capability than we’ve taken in the past,” Austin said Thursday in his first press conference since he was hospitalized on Jan. 1 due to complications from prostate cancer treatment.

Previous U.S. strikes have not deterred the attacks. Since the war between Israel and Hamas broke out in October, Iranian-backed militant groups have struck U.S. bases in Iraq and Syria at least 166 times with rockets, missiles and one-way attack drones, drawing about a half-dozen U.S. counterstrikes on militant facilities in both countries. The U.S. military also has carried out airstrikes targeting the Iran-backed Houthi rebels in Yemen.

The U.S. has attributed the attack on Tower 22 in Jordan to the Islamic Resistance in Iraq.