Several short-range projectiles have been fired from North Korea's east coast on Saturday, according to South Korea's military.
They were fired from the Hodo peninsula in the east of the country,
If they are confirmed to be missiles, it would be the first missile launch since the North fired an intercontinental ballistic missile in November 2017.
The country is stepping up pressure against the United States after February's failed nuclear summit in Hanoi.

US seizes Russian-flagged oil tanker linked to Venezuela
Power restored in Berlin after longest blackout since World War Two
France working with allies on plan should US move on Greenland
South Korea's Lee says he asked Xi to play a mediating role on North Korea
Western Europe braces for another wave of snow and ice