First on CNN: Three US troops killed in drone attack in Jordan, more than 30 injured

The killing of three Americans at Tower 22 in Jordan near the border with Syria is a significant escalation of an already-precarious situation in the Middle East. Officials said the drone was fired by Iran-backed militants and appeared to come from Syria.

US Central Command confirmed in a statement on Sunday that three service members were killed and 25 injured in a one-way drone attack that “impacted at a base in northeast Jordan.” Two US officials told CNN the drone hit in the vicinity of living quarters on base, and that three the injured service members were medically evacuated from the area.

The number of wounded is expected to rise.

President Joe Biden vowed on Sunday to hold those responsible for the attack “to account,” saying that while facts are still being gathered, “We know it was carried out by radical Iran-backed militant groups operating in Syria and Iraq.”

“These service members embodied the very best of our nation: Unwavering in their bravery. Unflinching in their duty. Unbending in their commitment to our country — risking their own safety for the safety of their fellow Americans, and our allies and partners with whom we stand in the fight against terrorism. …  [H]ave no doubt – we will hold all those responsible to account at a time and in a manner our choosing.”

As of Friday, there had been more than 158 attacks on US and coalition forces in Iraq and Syria, though officials have described the constant volley of drones, rockets, and missiles as unsuccessful as they have frequently not caused serious injury or damage to infrastructure.

It’s unclear why air defenses failed to intercept the drone, which appears to be the first known attack on Tower 22 since attacks on US and coalition forces began on October 17. US forces at the outpost are there as part of an advise-and-assist mission with Jordan.

The US has taken several retaliatory actions against the Iran-backed groups in Iraq and Syria, one as recently as last week, when the US struck three facilities in Iraq used by Kataib Hezbollah and other Iran-affiliated groups. The US has also been engaged with the Iran-backed Houthis in Yemen, carrying out multiple strikes — many unilaterally and some with the UK and other allies — on Houthi missiles and drones, radar systems, storage facilities, and more.

The Biden administration has been criticized, primarily by Republicans, for not taking strong enough action against the Iran-backed groups for their attacks. In a statement on Sunday following the news of the three Americans killed, Sen. Lindsey Graham said the Biden administration’s “policy of deterrence against Iran has failed miserably.”

“The Biden Administration can take out all the Iranian proxies they like, but it will not deter Iranian aggression. I am calling on the Biden Administration to strike targets of significance inside Iran, not only as reprisal for the killing of our forces, but as deterrence against future aggression,” Graham said.

Amid the increasingly high tensions on multiple fronts in the region, US officials have repeatedly said they do not want to see tensions boil over into a regional war. Asked last week whether the Pentagon assessed that Iranian proxies were stepping up their attacks on US forces, Deputy Pentagon Press Secretary Sabrina Singh said, “Not necessarily, no.”

In a previously recorded interview with ABC News that aired Sunday morning, Chairman of the Joint Chiefs of Staff Gen. CQ Brown said part of the US’ work is to “make sure as things have happened in the Middle East is not to have the conflict broaden.”

“The goal is to deter them and we don’t want to go down a path of greater escalation that drives to a much broader conflict within the region,” he said.

There have been dozens of injuries since the attacks began — a senior military official told reporters last week there were roughly 70 — but the Pentagon has classified most of them as minor, aside from one US soldier who was critically injured in an attack in Iraq on Christmas Day.

Chief Warrant Officer 4 Garrett Illerbrunn from the 82nd Combat Aviation Brigade was set to be sent back to the US for further treatment after he critically injured in a drone attack on Erbil Airbase.

The killing of three Americans also comes as the US and Iraq are expected to begin talks soon about the future of the US military presence in the country.

This is a developing story and will be updated.

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