Iranian missile attacks on two Iraqi military bases housing American troops early Wednesday morning was a “slap on the face” to the U.S., Iran’s Supreme Leader Ayatollah Ali Khamenei said in a speech several hours after the strike.

But “such military actions are not enough,” Khamenei said on Twitter shortly thereafter, suggesting further acts of revenge for the U.S. killing of top Iranian general Qasem Soleimani.

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Khamenei went on to describe the U.S. presence as a source of corruption in the Middle East and demanded that U.S. troops leave the region. He named Iran’s enemies as the U.S., Israel and the “arrogant system” in an apparent reference to the West. Washington and Tehran have not had formal diplomatic relations since 1980.

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