An Israeli missile strike on Syria's capital Damascus on Saturday (January 20) killed four members of Iran's Revolutionary Guards, including the head of the force's information unit in Syria, a security source in the regional pro-Syria alliance told Reuters.
The security source, part of a network of groups close to Syria's government and its major ally Iran, said the multi-storey building was used by Iranian advisers supporting President Bashar al-Assad's government, and that it was entirely flattened by "precision-targeted Israeli missiles".
Iran's state-run Press TV said two Iranian Guards military advisers were killed in the Israeli strike on Damascus.
Syrian state media said a building in the Mazzeh neighbourhood of Damascus was targeted in a likely Israeli attack, without giving further details. Other local media in Syria said explosions were heard across the Syrian capital.
Essam Al-Amin, head of the Al-Mowasat Hospital in Damascus, told Reuters that his hospital had received one corpse and three wounded people, including a woman, following Saturday's attack.
There was no immediate comment from Israel.