North Korea has fired at least one unknown projectile, less than a week after it tested several short-range missiles, South Korea’s military says.
The projectile was fired from the Sino-ri location north-west of the capital, Pyongyang, toward the east.
The test comes as a top US envoy is in South Korea for talks on how to break the deadlock over nuclear negotiations.
Analysts say the North is trying to increase pressure on the US over its failure to make concessions.
A meeting in Vietnam between North Korean leader Kim Jong-un and US President Donald Trump ended without agreement in February. Mr Trump walked away from what he described as a bad deal offered by Mr Kim.