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Updated Jul 28, 2026 · 19:45
World News Updated Jul 28, 2026

White Phosphorus Leak at US Base Triggers Brief Evacuation Alert

A brief evacuation alert was issued in Pyeongtaek, South Korea, after a white phosphorus leak at the US Osan Air Base. The toxic chemical leaked from two munitions but was reported to be 80% diluted, posing a low risk to public health. No casualties were reported, and the alert was lifted after 36 minutes. The US military confirmed a ground mishap and is managing the situation with emergency response teams.

Brief alert issued after US military reports low-risk white phosphorus leak at air base

Pyeongtaek, July 28

A brief evacuation alert was issued Tuesday in the regional city of Pyeongtaek, home to the US Forces Korea, following a report of a minor white phosphorus leak at the US base that officials say posed a low risk.

Police and fire authorities said they received calls from the US military at around 5:07 pm reporting the leak of the toxic chemical substance at the K-55 US Osan Air Base in Pyeongtaek, about 60 kilometres south of Seoul.

The Pyeongtaek city government issued the alert notifying the public of the possible white phosphorus leak and advising residents nearby to evacuate to a safe location to prevent skin exposure, Yonhap News Agency reported.

White phosphorus is an extremely toxic substance capable of burning human tissue down to the bone upon contact. Its military use is tightly regulated and discouraged by the international community.

Officials said white phosphorus leaked from two munitions, although the exact amount released remains unconfirmed. No casualties have been reported, they said.

The US military reportedly informed the city that the leaked substance had been roughly 80 per cent diluted and that it poses a low risk to public health and the surrounding environment.

Pyeongtaek authorities subsequently lifted the evacuation advisory, about 36 minutes after the initial alert, informing residents that it was safe to return to normal after necessary measures were completed at the US base.

The US military confirmed a "ground mishap" had occurred and cordoned off the area to protect the base and local residents, saying the situation is being addressed swiftly.

"Our emergency response professionals are currently managing an isolated situation on the installation. We are handling this matter with the utmost care and expediency," the US 51st Fighter Wing said in a statement.

The unit added that some reports of a general evacuation of Osan Air Base were incorrect.

The leak report had prompted authorities to send firefighters and related equipment to the scene and coordinate joint responses with the US military, officials said.

Police had set up a cordon with patrol vehicles about 300 to 500 meters from the base as a precaution, and blocked civilian access and detoured traffic.

"The chemical substance, used for cleaning warheads, leaked inside the K-55 munition depot, but the US military informed us that the situation is now under control and poses no danger," a police official said.

"A US military explosive ordnance disposal team and our firefighters responded to the scene, and operations are now largely complete," the official said.

— IANS

Reader Comments

Priya S

Good that they acted fast and alerted people. But 36 minutes evacuation is too short – what if someone had skin contact? The US military should have better protocols. We need transparency on such incidents.

Ravi K

White phosphorus is no joke – it's a war crime to use on humans. So even a "low risk" leak near civilians is serious. Hope Korea demands stricter safety measures. 🇮🇳 We must ensure our own defense installations follow best practices.

Sneha F

Glad no one was hurt, but the communication was messy – "general evacuation" denied but local police blocked roads. Consistency matters in emergencies. Also, cleaning warheads? Sounds like a cover story. 🤔

Amit V

Good response time by local authorities. But the US military should store such dangerous chemicals in safer containers. This could have been major. Reminds us of Bhopal – we can't be complacent with foreign bases.

Arjun K

Kudos to the firefighters and local police for quick coordination. But is "80% diluted" even safe? Phosphorus is phosphorus. Korea should demand an independent environmental probe. India's own defence forces should learn from this.

Deepak U

Interesting that they used white phosphorus for cleaning warheads. Why

We welcome thoughtful discussions from our readers. Please keep comments respectful and on-topic.

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