It is not yet known whether any casualties resulted from the missile strike or what kind of damage was sustained at the base. It is also not precisely known how many missiles were fired or what type they were. Furthermore, it is not known whether US anti-missile defences at the base were able to intercept any of the incoming missiles, Efe news reported.
The White House said that President Donald Trump was informed of the attack and is in contact with his national security team, while state-run Iranian media are saying that the Revolutionary Guards mounted the attack.
"This morning, courageous fighters of the (Iranian Revolutionary Guard) Air Force launched a successful operation called Operation Martyr Soleimani, with the code 'Oh Zahra' by firing tens of ground-to-ground missiles at the base of the terrorist and invasive US forces named Ain Al Asad," Iran's ISNA news agency reported.
ABC News reported that a US official confirmed that "ballistic missiles" were fired from inside Iran at multiple US military facilities in Iraq, including Erbil in northern Iraq and the Al Asad Air Base in western Iraq.
"We are aware of the reports of attacks on US facilities in Iraq," White House press secretary Stephanie Grisham said a statement. "The President has been briefed and is monitoring the situation closely and consulting with his national security team."
( With inputs from IANS )