According to the South Korean 'Central Daily News', on the afternoon of July 28 local time, a white phosphorus leak occurred at the Ulsan Air Base of the United States Army in Pyeongze City, Gyeonggi Province. As a result, the Pyeongze City government issued an emergency evacuation order for residents in the surrounding areas. South Korean fire departments and police are investigating the cause of this incident.
According to the Pingze City Government, a white phosphorus leak occurred at Wushan Air Force Base around 5:05 pm local time (4:05 pm Beijing time). The government sent an emergency alert via text message to nearby residents, urging them to evacuate to safe locations to avoid skin contact with the leaked substance.
White phosphorus is commonly used to make weapons such as incendiary bombs. Contact with it can cause severe burns, and inhaling large amounts of white phosphorus smoke can be fatal.

Source image: Umsan Air Base of US military forces in South Korea. IC photo
South Korean fire departments and police have rushed to the scene, sealed off the relevant areas, and taken security measures. According to a South Korean police officer quoted by the Central Daily News, the US military has informed South Korea about this accident. However, the South Korean government has not yet determined the details of the accident. Fire departments, police, and military agencies are investigating the exact cause of the accident.