White Phosphorus Leak Reported at US Osan Air Base in South Korea, Evacuation Alert Issued
A minor chemical leak involving white phosphorus at a U.S. military base in South Korea prompted local authorities to issue a brief emergency evacuation alert on Tuesday before officials contained the situation and confirmed low risk to the public.
A minor chemical leak involving white phosphorus at a U.S. military base in South Korea prompted local authorities to issue a brief emergency evacuation alert on Tuesday before officials contained the situation and confirmed low risk to the public. The incident occurred around 5:00 p.m. local time inside a munitions depot at the K-55 Osan Air Base in Pyeongtaek, located approximately 60 kilometers south of Seoul. Local emergency services responded following notification from the U.S. military that the toxic chemical had leaked from two munitions.
In response, the Pyeongtaek city government sent an emergency text alert advising nearby residents to evacuate to safe locations and avoid potential skin exposure. Local police established a temporary cordon between 300 and 500 meters from the perimeter, redirecting traffic and blocking civilian entry as a precaution. Pentagon Lockdown Triggered by Air Quality Issue, Hazmat Teams Deployed.
The U.S. 51st Fighter Wing confirmed that emergency personnel managed an isolated "ground mishap" on the installation. Military officials informed local authorities that the leaked chemical had been roughly 80 percent diluted, significantly minimizing health and environmental hazards. The city government lifted the evacuation advisory approximately 36 minutes after the initial alert, confirming that safety operations were complete and conditions were normal. No casualties or injuries were reported. Dangerous Storms Prompt US Secret Service to Evacuate National Mall Ahead of Trump's Independence Day Address.
White phosphorus is a highly reactive chemical used in military operations to create dense smoke screens or as an incendiary agent. Due to its potential to cause severe skin burns and toxic smoke inhalation, the handling and military use of the chemical are subject to strict international regulations. Emergency teams and military authorities are reviewing the incident to determine the exact cause of the leak.
(The above story first appeared on LatestLY on Jul 28, 2026 08:00 PM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).