South Korea says North Korea has fired three short-range guided missiles into its eastern waters. Pyongyang routinely test-launches such missiles.
Defense ministry spokesman Kim Min-seok says the North fired two missiles on Saturday morning and another in the afternoon. He says the North's intent was unclear.
In March, North Korea tested two short-range missiles off its east coast.
US officials say North Korea recently withdrew two mid-range missiles believed to be capable of reaching Guam after moving them to the east coast earlier this year.
The launches of short-range missiles come amid signs of diplomacy after weeks of warlike threats from North Korea.