South Korean authorities order evacuations after reports of a white phosphorus leak at a U.S. military base near Seoul, according to multiple outlets. The incident involves the U.S. 51st Fighter Wing, which controls an air base in the area. After officials receive reports of a leak, South Korean authorities briefly order residents to evacuate and direct them to leave nearby areas. The U.S. side also establishes a safety perimeter around the base to reduce public exposure. The Independent reports the perimeter is set at roughly 1,000 feet, while ABC News says the evacuation order is issued by South Korean authorities in response to the reported material. Residents are urged to follow local instructions and leave the area during the response. The outlets do not provide consistent additional details on the cause of the leak, its severity beyond the reported white phosphorus, or whether any injuries occur in the information provided here. The situation is presented as an active safety response managed jointly by South Korean officials and the U.S. military, with evacuation measures taken as a precaution.