North Korea has fired two short-range missiles in its second weapons test in less than a week, the South Korean military says.
The missiles fired from the Sino-ri base in the north-west of the country travelled 420km (260 miles) and 270km.
The tests come 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, reports BBC.
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.