US military confirms no white phosphorus leak at Osan Air Base in South Korea

US military confirmed no white phosphorus leak at Osan Air Base in South Korea, after Pyeongtaek city urged residents to evacuate over suspected chemical concerns. Investigation found residue from a routine munitions inspection was non-hazardous surface corrosion from environmental exposure, not white phosphorus. The evacuation alert was lifted after decontamination work, and no injuries were reported. White phosphorus is a controversial incendiary chemical. The US keeps about 28,500 troops in South Korea as deterrence. Earlier, eight students were detained for allegedly entering the base.