Iran has begun firing missiles at U.S forces

​Missile attacks target US forces in Iraq, senior military source says; Iran suspected.

Missiles were fired early Wednesday in multiple locations across Iraq, a senior U.S. military source in the country told Fox News, describing it as a series of attacks on U.S. forces from Iran.
The U.S Military has stated some of their bases are  "Under missile attack from Iran. These are either cruise missiles or short-range ballistic missiles. All over the country." The missiles struck near Al Assad Air Base in Anbar among other locations; the air base houses U.S. troops.
There was no immediate word on injuries or damage.
The White House said after the attack: “We are aware of the reports of attacks on U.S. facilities in Iraq. The president has been briefed and is monitoring the situation closely and consulting with his national security team.” It was not immediately clear how the U.S. may respond.

Updated information

Iran 'threatens to hit Israel and even Dubai if US retaliates over airbase bombing'. Iran's Revolutionary Guard warned the US and its regional allies against retaliating over the missile attack.

​Here is the statement made by military officials of Iran, 'We are warning all American allies, who gave their bases to its terrorist army, that any territory that is the starting point of aggressive acts against Iran will be targeted,' The Guard said.