(CNN) 鈥� The US has begun conducting strikes on targets in Iraq and Syria, the start of what will likely be a series of larger-scale US strikes on Iranian-backed militias who have carried out attacks on US troops in the Middle East, according to two US officials.
The retaliatory strikes came in response to a drone strike by Iran-backed militants on a US military outpost in Jordan on Sunday, which and wounded more than 40 others.
They came not long after President and met family members of the soldiers killed in Jordan.
Officials have signaled the strikes are likely to be more significant than previous attacks on Iranian-backed militias over the last several weeks, which have primarily focused on weapons storage or training facilities. But the administration is threading a needle 鈥� they want to deter and stop further attacks but avoid a full-scale conflict with Iran breaking out in a region already roiled by the continuing Israel-Hamas war in Gaza.
The Biden administration has signaled there could be additional actions in the coming days; Defense Secretary Lloyd Austin said Thursday the US response would be 鈥渕ulti-tiered.鈥�
鈥淲e have the ability to respond聽a number of times, depending on what the situation is,鈥� he said at a news conference at the Pentagon.
鈥淭hey have a lot of capability. I have a lot more,鈥� Austin added referring to the Iranian-backed militias.
Biden聽has been under increasing pressure to respond to the soldiers鈥� deaths in a way that stops the militia attacks for good, CNN previously reported. Iran-backed militants have targeted US military facilities in Iraq and Syria over 160 times since October, and several Republican lawmakers had called for the US to hit inside Iran directly to send a clear message.聽But administration officials have been clear that any response would be proportionate as to not further escalate things in the region.
鈥淲e don鈥檛 seek a war with Iran. We鈥檙e not looking for a wider conflict in the Middle East,鈥� John Kirby, the strategic communications coordinator聽for the National Security Council, told CNN on Monday.
On Wednesday the White House said it believes an umbrella group of militants called Islamic Resistance in Iraq was behind the drone attack in Jordan.
鈥淲e believe that the attack in Jordan was planned, resourced and facilitated by an umbrella group called the Islamic Resistance in Iraq, which contains multiple groups including Kata鈥檌b Hezbollah,鈥� Kirby said.
He stopped short of assigning exact blame on Kata鈥檌b Hezbollah, the most powerful聽Iran-backed militia in Iraq, saying it was not the only group responsible for previous attacks on US bases.
鈥淭his certainly has the earmarks of the kinds of things that Kata鈥檌b Hezbollah does,鈥� he said, adding, 鈥淭he attribution that that our intelligence community is comfortable with is that this was done by the umbrella group called the Islamic Resistance in Iraq.鈥�
The US military has聽carried out several strikes targeting Iranian proxies鈥� weapons depots in Iraq and Syria since October, but none of those strikes deterred the militants, whose 165 attacks injured over 120 US service members across the region.
Iran has spent years investing in these聽regional proxy groups, informally known as the 鈥渁xis of resistance,鈥� supplying them with money, weapons, and training as Tehran has sought to broaden its influence in the Middle East and pressure the United States to disengage from the region.
None of the proxy groups鈥� other attacks since October, however, have resulted in the deaths of US service members.聽Sunday鈥檚 attack marked a significant escalation that Biden and his national security team believed they were compelled to respond to forcefully.
Iran has repeatedly said that it is not seeking conflict. On Friday, Iranian President Ebrahim Raisi said his country will not initiate a war but will 鈥渞espond strongly鈥� to bullies.
鈥淲e have said many times that we will not start any war; but if an oppressive country or force wants to bully us, the Islamic Republic of Iran will respond strongly,鈥� he said in a televised speech in the southern Iranian Hormozgan province.
There have been mixed messages from the militias though.
In a sign of a possible effort to quell the tensions, Kataib Hezbollah, announced on Tuesday the suspension of its military operations against US forces in the region.聽
鈥淲e are announcing the suspension of military and security operations against the occupation forces (US troops) - in order to prevent embarrassment to the Iraqi government,鈥� Kataib Hezbollah said in a statement. 鈥淲e will continue to defend our people in Gaza in other ways, and we recommend to the brave Mujahideen of the Free Hezbollah Brigades to聽[carry out] passive defense (temporarily) if any hostile American action occurs towards them.鈥�
But on Friday the leader of the Al-Nujaba militant group, Akram Al-Kaabi, said it would continue to attack US targets.
This story is breaking and will be updated.
The-CNN-Wire
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