A man rides a motorbike past a poster depicting Hezbollah leader Hassan Nasrallah, near Sidon, Lebanon, July 7, 2020. Photo: Reuters / Ali Hashisho.

A Hezbollah fighter was killed in an Israeli attack in Syria, the Iranian-backed Lebanese Shi’ite group’s first declared casualty there since its leader warned last year that further killings of its members in Syria would face retaliation.

Ali Kamel Mohsen, from south Lebanon, was killed by an Israeli air strike near Damascus International Airport, according to a death notice declaring him a martyr with the Islamic Resistance, a reference to Hezbollah, and which was confirmed by the group.

It was an apparent reference to a strike on Monday night that Western intelligence sources said hit a major Iranian-backed ammunition depot on the edge of the Syrian capital.

Syrian state media said air defenses had intercepted a new Israeli “aggression” above the capital Damascus.

Hezbollah has deployed fighters in Syria as part of Iran-backed efforts to support President Bashar al-Assad in a conflict that spiraled out of protests against his rule in 2011.

Following the killing of two Hezbollah members in Damascus last August, Hassan Nasrallah, the group’s leader, vowed it would respond if Israel killed any more of its fighters in the country.