Nigeria, Jan. 8 -- Iran launched ballistic missiles at two Iraqi bases which house U.S. troops, in the early hours of Wednesday morning local time.

According to CNN reports, more than a dozen missiles struck the al-Asad airbase and another base in Erbil.

So far, it seems there were no casualties. U.S. military sources were quoted as saying troops were given enough warning to reach shelters before the missiles struck.

The attacks were Iran's response to the U.S. killing last week of top Iranian General Qasem Soleimani in Baghdad. Iran has called that attack an "act of war" and "state terrorism" and vowed a response.

After the attacks, Iranian foreign minister, Mohammad Javad Zarif, tweeted in the early hours of Wednesday morning that I...