The downing of the warplane - the first time in the conflict that the USA has shot down a Syrian jet - came as Iran fired several ballistic missiles at IS positions in eastern Syria in retaliation for two attacks by the extremists in Tehran earlier this month that killed 17 people.
Iran's Revolutionary Guard is warning Islamic State militants that missile attacks launched into eastern Syria the previous day can be repeated if the extremists take action against Iran's security.
Activists in Syria did not immediately have information about the Iranian-claimed strikes.
The strike was "revenge" for twin attacks in Tehran on June 7 that killed 17 people in the first IS-claimed attacks inside the Shiite-ruled Islamic republic, a Guards spokesman added.
The former MP emphasized that the missile attack is also justifiable in terms of worldwide norms.More news: Severe weather expected to affect 60 million Americans Monday
The U.S. military confirmed a U.S. F-18 Super Hornet shot down Sunday a Syrian SU-22 after it dropped bombs near the U.S. partner forces, known as the Syrian Democratic Forces, aligned with the Americans in the fight against the Islamic State group.
Iran's missile stockpile is considered one of the largest and most advanced in the Middle East.
Russia's Defence Ministry said yesterday it would view as targets any flying objects over Syria in areas of the country where its air forces operate. Iran's Revolutionary Guard, a hard-line paramilitary force, has seen advisers and fighters killed in the conflict.
Iranian media reported some of the mid-range missiles fired into Syria were of the Zolfaghar type, a precision-guided missile with a range of about 750 kilometres.More news: Who Was Charleena Lyles? She Was Shot & Killed After Calling 911
Brigadier General Amir Ali Hajizadeh, commander of the IRGC aerospace unit, hailed the missile raids, saying any more evil act against Iran will result in "costly consequences".
Alaeddin Boroujerdi, chairman of a parliamentary committee on foreign affairs and national security, called Sunday's strike "an appropriate response to the US Senate vote".
Iran revealed footage of the missile strikes, which were caught on camera by Iranian drones flying in Syria, according to a senior Iranian Revolutionary Guards Corps (IRGC) commander. However, the test launches haven't affect Iran's 2015 nuclear deal with world powers.
Israeli Prime Minister Benjamin Netanyahu appeared to pour cold water on Monday a Wall Street Journal report that the Jewish.More news: Iran launches missiles into Syria in revenge for attacks
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