North Korea launches ballistic missile off its east coast, South Korea says

North Korea launched a ballistic missile off its east coast on Monday, South Korea's military said, a day after the North vowed "offensive and overwhelming" responses to protest a new U.S. military drill with South Korea and Japan.

South Korea's Joint Chiefs of Staff said the launch was made on Monday morning, but gave no further details, including how far the weapon traveled. "Unknown ballistic missile launched in the north, east," a notice from the Joint Chiefs read.

The launch came two days after South Korea, the U.S. and Japan ended their new multidomain trilateral drills. The "Freedom Edge" drill drew a U.S. aircraft carrier and destroyers, fighter jets and helicopters from the three countries, and the three countries practiced missile defense, anti-submarine and maritime interdiction drills.