A ballistic missile fired by North Korea has landed within Japan's economic zone, according to reports.
The projectile landed within 370km of Japan's coast after being fired just before midnight on Tuesday night (local time), Japanese Prime Minister Shinzo Abe said.
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An emergency meeting has been called by Mr Abe with other top officials, to discuss the latest test.
The South Korean military originally reported the launch, and both South Korea and the US are investigating, according to Yonhap News Agency.
The missile was launched from Pyongsong in South Pyongan Province, Yonhap reports, and travelled eastward, towards Japan.
Japan issued a fresh warning over the threat of a missile launch on Tuesday (NZ time).
The launch is believed to be the latest in a series of missile tests conducted by North Korea this year.
Others launched in previous months have flown over Japan.