US President Donald Trump has pledged to make a statement Wednesday morning on Iran's missile attack on US bases in Iraq.

"All is well! Missiles launched from Iran at two military bases located in Iraq. Assessment of casualties & damages taking place now. So far, so good! We have the most powerful and well equipped military anywhere in the world, by far! I will be making a statement tomorrow morning," he wrote on Twitter.

The Islamic Revolution Guards Corps (IRGC) of Iran has this morning announced the start of operations to exact revenge for the assassination of General Qasem Soleimani. Surface-to-surface missiles have been fired from Iran toward the Ayn al-Assad and the Erbil bases in western Iraq, where the US military is stationed.