North Korea has test-fired three short-range missiles.
It fired two surface-to-ship missiles off its east coast between 8.20am and 9am (Irish time) that flew about 100km and splashed into the sea, a South Korean defence official said.
A third missile was fired around two hours later.
A South Korean daily said that the North may also test fire mid-range missiles in a matter of days.
North Korea was hit with UN sanctions following its 25 May nuclear test.
Japan was quick to condemn Pyongyang's latest action.
The short-range missile launches came after regional markets had closed for the day.
The US said this week it had tightened its crackdown on firms linked to North Korea's lucrative proliferation of missiles, a major source of cash for the state.
China said it was sending its envoy to the six-party talks to South Korea, Japan, Russia and the US.
North Korea, the sixth party, is not on the itinerary.
North Korea fired a barrage of short-range missiles following its May nuclear test, which experts said put the state closer to having a working nuclear bomb.
