Israel awaits with anticipation Iran's retaliation for the airstrike on Syria that killed four people on Monday, including two of the Iranian Revolutionary Guards Corps (IRGC).
Syrian state media said that two civilians were killed during the attack, while the Syrian Observatory for Human Rights (SOHR) said they were two Syrian militants fighting with pro-Iran militias.
The Observatory said the two dead Iranians killed were affiliated with al-Quds Force. Six militiamen were also wounded, it added.
Iranian Foreign Ministry spokesman Saeed Khatibzadeh said revenge for Monday's strike will be taken, adding that holding Israel accountable for such attacks "is one of the main goals of the resistance (forces) in the region."
The IRGC's Sepah News website said: "Guard colonels Ehsan Karbalaipour and Morteza Saidnejad were martyred, a crime committed by the Zionist regime, during a rocket attack on the suburbs of Damascus, Syria, yesterday morning."
The site stated that Israel would "pay for this crime."
The strike's target was an ammunition depot operated by Iran-backed militias near Damascus international airport.
SOHR said Israel has carried out raids in Syria at least seven times this year.
Iran is Syrian President Bashar al-Assad's strongest ally in the conflict. The Syrian army and thousands of Iranian-backed militants are fighting the Syrian opposition, backed by the Russian air force.
According to Walla's military correspondent, Israel is aware of Iran's determination to respond to the killing of the two IRGC members.
The Israeli army raised the state of alert and readiness of its units operating the "Iron Dome" systems along the border with Syria and stated that it was preparing for a possible missile attack from Syria.
In April, Iran admitted to casualties among its forces during an Israeli attack on sites in Syria, including seven fighters killed in an attack on T4 airport east of Homs. A month later, Iran responded with a barrage of missiles fired by armed militia at Israeli sites.
The Quds Force unofficial Telegram channel reported that Iran retaliated for the death of its members at the Syrian T4 base after an Israeli raid that killed seven Iranian forces in 2018.
The channel reported that Tehran responded by bombing an Israeli base in the occupied Golan with fifty missiles, noting that Israelis did not report the attack and the damage incurred.
Several Israeli experts admitted that the firing of 50 missiles from Syria at Israeli bases was an unprecedented matter that surprised observers.