Human Rights Watch on March 6, 2026, verified the use of artillery‑delivered white phosphorus over Yohmor, southern Lebanon, on March 3, 2026, geolocating imagery of airburst munitions over residential areas and photographs showing fires on rooftops that responders attributed to white phosphorus (Human Rights Watch, March 6, 2026). The organisation concluded such use in populated areas is prima facie indiscriminate and unlawful under international humanitarian law.

White phosphorus can scatter burning fragments over wide radii, igniting structures and causing severe burns. HRW identified signatures consistent with M825‑series 155mm projectiles and noted prior use between October 2023 and May 2024. As of March 6, 2026, Lebanese health‑ministry figures cited by HRW reported at least 217 deaths and mass displacement linked to the recent escalation.

The incident exposes legal gaps. Protocol III of the Convention on Conventional Weapons, which limits incendiary weapons, does not bind Israel and excludes certain multipurpose munitions like white phosphorus, creating loopholes that critics say enable humanitarian harm without clear prosecution thresholds. HRW urged Israel to cease airburst use in populated areas, called on allies to suspend arms transfers, and recommended Lebanon strengthen domestic investigations and consider accession to the ICC.

Yohmor is a reminder that norms without universal legal coverage leave civilians exposed; closing regulatory loopholes and ensuring independent probes are urgent if further civilian harm is to be prevented.

Source: Human Rights Watch, “Israel unlawfully used white phosphorus over residential areas in southern Lebanon,” March 6, 2026; geolocated images of March 3, 2026; Lebanese health ministry figures cited by HRW, as of March 6, 2026.