SEOUL, South Korea (AP) — North Korea launched a ballistic missile toward the sea on Wednesday, its neighbors said, the second such weapons testing activity in less than a week.The series of launch events were likely a protest of the upcoming Korea-U.S. military drills that North Korea views as an invasion rehearsal.South Korea’s Joint Chiefs of Staff said it detected the launch from North Korea’s eastern coastal Wonsan area in a direction of the North’s eastern waters around 6 a.m.South Korea’s military said it boosted its surveillance posture and that Seoul was closely exchanging information on the launch with Washington and Tokyo.Japan’s Defense Ministry said it also spotted a suspected ballistic missile launch from North Korea. It said it didn’t detect the weapon reaching Japan’s exclusive economic zone, suggesting it was believed to have fallen further away from the Japanese coast.

The latest launch came two days after South Korea and the United States announced they will kick off their annual large-scale military drills next week to beef up readiness against North Korean threats.The Ulchi Freedom Shield training is to start on Monday, Aug. 17, for an 11-day run. Its scale will be similar to previous years with 18,000 South Korean soldiers taking part, according to South Korea’s military.