North Korea on Saturday fired a series of short-range missiles from its eastern coast, the South Korean Joint Chiefs of Staff said, a likely sign of Pyongyang's growing frustration at stalled diplomatic talks with Washington over its nuclear arsenal.
The Joint Chiefs of Staff said North Korea launched "several" short-range missiles off its eastern coast.
The military said in a statement on Saturday that the missiles flew up to 200km before they landed in the water.
The South had previously said the North launched a single missile.
South Korean and US authorities are analysing the details, but if it is confirmed as a firing of banned ballistic missiles, it will be the first such launch since the North's November 2017 test of an intercontinental ballistic missile. That year saw a string of increasingly powerful weapons tests from the North, and a belligerent response from President Donald Trump that had many in the region fearing war.