Photo/Illutration A TV screen shows a file image of North Korea's missile launch during a news program at the Seoul Railway Station in Seoul on Sept. 29. (AP Photo)

TOKYO — North Korea has fired suspected ballistic missiles, the Japanese Defense Ministry said Saturday.

Further details are still being analyzed, ministry officials said.

Japan's NHK national television said multiple missiles fired from the North are believed to have landed in the Sea of Japan and outside of Japan's exclusive economic zone.

North Korea’s escalating missile launches included a firing after U.S. Vice President Kamala Harris’ visit in South Korea and the first anti-submarine training in five years among the United States, South Korea and Japan.

North Korea has significantly advanced its missile technology in recent years and has a variety of nuclear-capable missiles that place both the United states and its allies South Korea and Japan within striking distance.

This year, North Korea performed missile tests more than 20 times, a record number, as it refuses to resume long-stalled nuclear talks with the United States.

The North also has been pushing to advance its ability to fire missiles from submarines. South Korean officials said recently that they had detected signs that North Korea was preparing to test-fire a missile from a submarine.

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