US base attacks: Video appears to show moment of Iran attack on Al Asad air base in Iraq

Footage shared on social media appears to show a number of missiles raining down in Iraq, illuminating the night sky, as bases housing US troops are targeted in an ongoing attack launched by Iran.

CNN says the video was filmed by someone inside an Iraqi base near the Al Asad airbase in western Iraq at the time of the attack. The US news network said it had not yet independently verified the video.

The footage was also shared on Twitter by the chairman of Iraq's Advisory Council, Farhad Alaaldin. It appears Alaaldin screen-recorded the video before uploading it.

"Projectiles [are] landing in the distance," Alaaldin wrote.

An Arabic-speaking Twitter user translated the terrified voices in the video, saying it was mostly "screaming". 

"[They were] saying it was headed to the American base," the man wrote.

"In the beginning he said it was the third missile. So I guess it was at least five missiles up to that video."

Another added that the Iraqi people appeared to be saying "help us God" and "they're aiming at the Americans".

Iran has fired more than a dozen missiles at two US bases in Iraq, including al-Asad and a complex in northern Iraq's Erbil. The al-Asad military complex is used by Iraqi and US armed forces.

It follows the US-directed killing of Iranian major general Qassem Soleimani.