South Korean authorities issue an alert to residents near a US military base located outside Seoul after reports of a suspected white phosphorus leak. According to both outlets, local officials notify the public in the surrounding area as a precaution while investigating the incident. The reports characterize the event as a “phosphorus leak,” specifically referring to white phosphorus, and describe the alert as being issued due to potential safety risks associated with the material. The information provided across sources focuses on the initial public warning and the location near the South Korean capital, rather than offering confirmed details about the cause of the leak, the extent of any release, or whether any injuries are reported. The incident is presented as an active matter being handled by authorities, with the alert serving as an immediate protective measure for people living near the base while further checks are carried out.