South Korea's military says North Korea has fired several ballistic missiles into the sea. The launch Monday happened hours after South Korean and U.S. troops kicked off their large annual combined drills,

North Korea unleashes deadly ballistic missile salvo into the sea as it makes chilling threats of conflict and US - South Korean troops go on high-alert during military drills

The South Korean military said the accident near the North Korean border occurred during training ahead of Freedom Shield, an annual U.S.-South Korea joint military exercise.