The U.S. Forces Korea (USFK) says no white phosphorus is found at Osan Air Base in Pyeongtaek after a regional alert about a possible chemical leak. According to the USFK, an emergency notice was issued on July 28 by the Pyeongtaek city government after a report from the U.S. military. Officials advised residents to take precautionary measures, including evacuation guidance, while the base investigated the report. USFK says it conducts thorough inspection and testing of the crystallization and residue identified during a routine munitions inspection on July 28. The force states the residue is not white phosphorus and does not contain traces of it. It adds that follow-on analysis determines the material is non-hazardous surface corrosion linked to environmental exposure over time. USFK also says emergency response professionals respond immediately to ensure munitions are fully contained and that base operations continue normally. Both outlets report that there are no injuries and that evacuation guidance is later rescinded after the investigation concludes the residue is harmless.