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Israel Fired U.S.- Made White Phosphorus Over Lebanese Homes.
Human Rights Watch confirmed that white phosphorus shells fired by Israel over residential areas in Yohmor, southern Lebanon were M825-series munitions traced to Pine Bluff Arsenal in Arkansas, the only white phosphorus filling facility in the Northern Hemisphere.
At least two artillery-delivered white phosphorus munitions being airburst over a residential neighborhood in the town of Yohmor, in southern Lebanon, March 3, 2026. By Human Rights Watch
The fires started on rooftops. Then balconies. Then a car parked on the street.
Civil defense workers in Yohmor, southern Lebanon knew what kind of fire it was before anyone needed to tell them. White phosphorus burns white.
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Human Rights Watch verified and geolocated eight images showing at least two artillery-delivered white phosphorus munitions airburst over a residential neighborhood in Yohmor on March 3, 2026.
They did not stop at confirming what was used. They traced where it came from.
HRW identified the munitions as M825-series 155mm artillery projectiles, the specific shell type that contains white phosphorus. Production codes on shell remnants pointed to one location.
Pine Bluff Arsenal. Jefferson County, Arkansas.
Pine Bluff Arsenal is the only facility in the Northern Hemisphere that fills white phosphorus munitions. Established in 1941 as a chemical warfare facility, it remains the US Army's sole production source for this specific weapon.
The metal parts on the shells were manufactured by General Dynamics, one of the largest defense contractors in the world.
That is the supply chain. Built in America. Transferred to Israel. Fired over Lebanese homes.
A Washington Post investigation previously confirmed that production codes on white phosphorus shells recovered from the Lebanese border town of Dheira matched two US facilities, including Pine Bluff Arsenal in Arkansas.
This is not new territory. It is a pattern.
White phosphorus can legally be used on battlefields to create smoke screens or mark targets. Under international humanitarian law however, airburst use overpopulated areas are unlawful.
Yohmor is a residential town. The shells were airburst over homes.
Both of those facts are documented, verified and geolocated by an internationally recognized human rights organization.
Here is the part that makes this more than a weapons story.
Israel previously pledged to phase out battlefield use of white phosphorus. It also possesses alternative smoke munitions that do not use it.
It chose this anyway.
Ramzi Kaiss, Lebanon researcher at Human Rights Watch, said the incendiary effects of white phosphorus can cause death or cruel injuries resulting in lifelong suffering. He called the use over residential areas extremely alarming.
The IDF declined to address HRW's findings entirely.
If you have followed this far, here is where US accountability enters the picture directly.
The US supplies Israel with over $3.8 billion in weapons annually. When white phosphorus use was raised previously, White House spokesperson John Kirby said Washington was concerned and investigating, adding that weapons transfers come with the full expectation they will be used in keeping with the law of armed conflict.
Homes were burning in Yohmor on March 3.
Arkansas lawmakers have continued pushing for Pine Bluff Arsenal to expand its production capacity, describing it as critical to addressing US munitions shortages.
The factory is not slowing down. The weapons it builds are already in the field.
And the production codes stamped on shell casings in southern Lebanon tell you exactly where they started their journey.
No comment from the IDF changes that. No expression of concern from Washington changes that.
The trail leads from a residential neighborhood in Lebanon, across an ocean, to a government arsenal in Arkansas.
That trail is documented. It is traceable. And it does not disappear because no one wants to follow it to its end.
Editor's Note: The confirmed use of US-manufactured white phosphorus shells over residential areas in southern Lebanon places American weapons directly at the center of an international humanitarian law question. When production codes on shell casings can be traced back to a specific US Army facility, the conversation about accountability cannot remain at the level of concern. It requires answers.
