North Korea has fired several projectiles believed to be short-range surface-to-ship cruise missiles off its east coast, South Korea's military said.
A continuation of weapons tests have rattled Washington and the North's neighbours as Pyongyang seeks to build a nuclear missile capable of reaching the continental United States.
South Korea's Joint Chiefs of Staff said in a statement that the launch came from the North Korean eastern coastal town of Wonsan, and that the projectiles likely flew about 200km (about 125 miles).
The statement said the launches were immediately reported to South Korean president Moon Jae-in but gave no further details.
Last week, North Korea fired a short-range missile ballistic missile that landed in Japan's maritime economic zone, prompting protest from both Tokyo and Seoul.
North Korea's weapons tests are meant to build a nuclear and missile programme that can stand up to what it sees as US and South Korean hostility, but they are also considered by outside analysts as ways to make its political demands clear to leaders in Washington and Seoul.
These demands include the removal of nearly 30,000 US troops in South Korea meant to check North Korean aggression.