Iran's Revolutionary Guard Corps issued a statement, saying that it launched surface-to-surface medium-range missiles into Syria's northeastern Deir el-Zour province where Daesh terrorists have a presence.
Iranian television showed footage of the missiles being launched into the night sky.
The Revolutionary Guards are fighting in Syria against militant groups who oppose President Bashar al-Assad.
The IRGC noted that a large number of terrorists have been killed in the attacks in which a large amount of terrorist weapons, ammunition, and systems were also destroyed.
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Cundy said there may have been other people in the tower that police are not aware of, which would add to the final death toll. The small protest made its way to Downing Street, May's official residence, where they met a large police presence.
"A missile strike on militants' positions is a warning to terrorists".
The Guard warned Islamic State militants and their "regional and global supporters" that similar retaliatory attacks would target them as well if another assault in Iran occurs.
Several Iranian news agencies reported on Sunday evening that Iran has fired several missiles at the bases of militant groups in eastern Syria.
Last week, Iran accused the US and its regional ally Saudi Arabia of supporting and aiding those attacks. In those attacks, ISIS-linked fighters stormed Parliament and a shrine to Ayatollah Ruhollah 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.