The Guard, which is also involved in the fight against the Islamic State group in neighboring Iraq, controls Iran's missile program.
The Guards said it fired six missiles from the west of Iran into Syria's mostly IS-held Deir Ezzor province.
"Drones flying from near Damascus to Deir Ezzor transmitted (footage of) missiles hitting their targets", he said.
'The missile attack on the Daesh was an overwhelming response to the terrorist group, as well as a message saying that the worldwide community must show more determination to fight terrorism, ' said Iranian Representative Ali Reza Rahimi. "Even Hezbollah can do better", he quoted the sources as saying.
The missile attacks came a week after ISIS militants attacked the Iranian parliament and the shrine of Ayatollah Ruhollah Khomeini, the founder of the Islamic republic.
Rahimi, a member of the parliamentary committee on National Security and Foreign Policy, recalled that the IRGC had warned that those terrorist attacks in Tehran would not go unanswered.
Also, Major General Mohammad Baqeri, head of the Iranian armed forces, pledged "unforgettable lessons" to terrorists and their backers after the Tehran assault. Former IRGC commander Mohsen Rezaei, who is now secretary of the Expediency Council, tweeted, "There are bigger strikes upcoming. Harsher slap is underway". The statement also promised more retribution attacks should Iran fall victim to any more terror attacks.
Iran has described the attackers as being "long affiliated with the Wahhabi", an ultraconservative form of Sunni Islam practiced in Saudi Arabia.
Iran's ballistic missile arsenal is one of the largest and most diverse in the region. Said Sharif. "Obviously and clearly, some reactionary countries of the region, especially Saudi Arabia, had announced that they are trying to bring insecurity into Iran".
Mohammadreza Aref, the leader of the pro-reform Hope faction, praised the missile attacks on ISIS strongholds, saying it was a "response to ill-wishers of the Islamic Iran".
McCain: Americans 'stupid' to still want to travel to NKorea
Warmbier, an OH native, was arrested in North Korea in January 2016 while visiting as a tourist. (AP Photo/John Minchillo, File). Doctors said he suffered extensive loss of brain tissue and "profound weakness and contraction" of his muscles, arms and legs.
Korea irrational, responsible for Warmbier's death
The funeral will be held at 9 a.m.at Wyoming High School, where Warmbier was an athlete and salutatorian of his 2013 class. Warmbier, who was visiting North Korea as part of a student tour, was released some 17 months after he was first detained.
Australia suspends air strikes in Syria
Russian Federation first halted the deconfliction agreement in April after the US carried out airstrikes on Syrian targets. He says: "We are not the initiator of any conflict and war but we do not tolerate creation of insecurity in our country".