North Korea has fired an unidentified missile from the Sunan district in its capital, Pyongyang, with the missile passing over Japan.
The Japanese government said the missile had passed over Hokkaido and the country's military did not try to shoot it down.
They issued a nationwide alert - but particularly told residents in the country's north to take shelter.
The South Korean and US militaries are analysing details of the launch.
This is a developing story.