North Korea launched a ballistic missile today, South Korea’s military said, days after Pyongyang conducted live-fire artillery drills near its maritime border with South Korea.

“North Korea fired an unidentified ballistic missile into the sea” off its east coast, South Korea’s Joint Chiefs of Staff said in a statement.

A projectile believed to be the missile has already fallen, according to a statement issued by Japan’s coast guard, which also said it may be a ballistic missile.

The North Korean missile appears to have landed outside of Japan’s Exclusive Economic Zone (EEZ), Japan’s NHK network also reported.

Tensions on the Korean peninsula have risen since Pyongyang launched its first military spy satellite in November.

In December, North Korea announced it had test-fired its newest intercontinental ballistic missile to assess its nuclear force’s combat readiness against growing US hostility, as Washington and its allies began operating a real-time missile data-sharing system .