The U.S. said it had downed the Syrian jet a day earlier after it dropped bombs near the U.S. -backed Syrian Democratic Forces conducting operations against the Islamic State group, adding that was something it would not tolerate.
Deir el-Zour is home to both Islamic State militants and civilians.
Iran has described the attackers as being "long affiliated with the Wahhabi", an ultraconservative form of Sunni Islam practiced in Saudi Arabia.More news: Justices take on fight over partisan electoral maps
Furthermore, as far as the use of long range missiles in the Syrian Civil War is concerned, both the United States and Russian Federation have conducted cruise missile strikes against targets in Syria.
Speaking to The Times of Israel later Monday, Ya'ari said his information was based on security sources, and that these sources were "amazed" at the poor performance of the Iranian missiles.
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".
But it was also meant to show that "Iran, in its fight against terrorism, needs missiles - and sanctions have no influence on its defence policies". The Russians appear to want to avoid further US targeting of Syrian warplanes or ground troops that have come under USA attack in eastern Syria recently.More news: Still in Critical Condition After London Fire
The missile operation "is just a very small part of the capability of Iran's punitive force against the terrorists and its enemies", the Islamic Students' News Agency quoted Guards spokesman Ramezan Sharif as telling state TV. The regional and worldwide sponsors of the terrorists must receive the revealing message of the assault, ' he said.
Iran's strike was conducted by forces from the Islamic Revolutionary Guards Corps, the country's radical paramilitary group, on Sunday.
The attacks targeted Isis command bases and other facilities in the eastern Syrian province of Deir ez-Zor.
The strike was meant to retaliate the terror group's June 7 twin attacks on Iran's Parliament and the Mausoleum of the late Founder of the Islamic Republic Imam Khomeini. However, it stopped short of directly blaming the kingdom for the attack, though many in the country expressed suspicion Iran's regional rival had a hand in the attack. Iran is a solid backer of the Syrian regime and has given President Bashar Assad extensive military and political support.More news: Brexit risks to UK economy in focus as Hammond, Carney speak
It also raised questions about how U.S. President Donald Trump's administration, which had previously put Iran "on notice" for its ballistic missile tests, will respond. "The supporters of terrorists should take heed of Iran's message of strength".
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