Iran has vowed to retaliate after it accused Israel of bombing its embassy complex in Syria on Monday, in a deadly escalation of regional tensions over the war in Gaza that once again appeared to raise the risk of a wider Middle Eastern conflict.

The airstrike destroyed the consulate building in the capital Damascus, killing at least seven officials including Mohammed Reza Zahedi, a top commander in Iran’s elite Revolutionary Guards (IRGC), and senior commander Mohammad Hadi Haji Rahimi, according to Iran’s Foreign Ministry.

Zahedi, a former commander of the IRGC’s ground forces, air force, and the deputy commander of its operations, is the most high-profile Iranian target killed since then-US President Donald Trump ordered the assassination of IRGC Gen. Qassem Soleimani in Baghdad in 2020.

Iran and Syria accused Israel of authoring the attack, with Tehran warning of a “serious response,” and the powerful Iran-backed Lebanese militant group Hezbollah saying the strike will be met with “punishment and revenge.” Iran also said it would hold the United States “answerable” due to its support of Israel.

The Israeli military told CNN it does not comment on foreign reports. However, a military spokesperson said Israel believes the target struck was a “military building of Quds forces” — a unit of the IRGC responsible for foreign operations.