Amid growing speculation that further ballistic missile testing could be imminent, North Korea has declared a no-sail zone off its east coast, South Korea’s Defense Ministry said on Tuesday.

The warning, which came just a day after Pyongyang declared a no-navigation zone off its west coast and conducted widely condemned live-fire drills, suggests that North Korea may launch short or mid-range ballistic missiles in the coming days.

“North Korea has internally set the no-sail zone in waters near Wonsan this week to control its vessels,” a military official told Yonhap News on Tuesday on condition of anonymity. “It is highly