Iran has launched several missiles into eastern Syria in retaliation for June 7 attacks in Tehran that killed 18 people, according to the Revolutionary Guard's website. In those attacks, ISIS-linked fighters stormed Parliament and a shrine to Ayatollah Ruhollah Khomeini.
A statement on the website said, "In this operation, several ground-to-ground midrange missiles were fired from IRGC bases in Kermanshah Province and targeted Takfiri [ISIS] forces in the Deir Ezzor region in Eastern Syria. The spilling of any pure blood will not go unanswered."
Iran is allied with Syrian President Bashar al-Assad in the ongoing Syrian civil war.