DAMASCUS - The death toll from a powerful explosion at a Syrian weapons depot near the Adra Industrial City in rural Damascus rose to 11 on Sunday, with most of the casualties believed to be civilians, a war monitor reported.

According to the Syrian Observatory for Human Rights and local media, search and rescue teams remain at the scene to recover bodies and clear debris.

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The blast sent debris flying and caused extensive damage to the facility associated with the now-ousted Bashar al-Assad's government.

Initial reports indicated at least two people were killed, but the death toll continued to rise throughout the day. A video posted online showed significant destruction and multiple fatalities.

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The observatory said the suspected raid was part of Israel's ongoing efforts to destroy remnants of the old regime's armaments.

This incident follows a series of reported Israeli attacks on former regime-affiliated sites, as Syria's new administration consolidates power after the collapse of the previous government on Dec 8.