5 things: North Korean missile falls near South Korean waters 2:23
(CNN) --
South Korea's Joint Chiefs of Staff (JCS) reported that North Korea fired at least one unidentified ballistic missile into the waters off the east coast of the Korean peninsula.
For its part, Japan's prime minister's office said the missile flew over Japan and has already landed in the Pacific Ocean.
Japan's prime minister's office tweeted: "Missile launch. Missile launch. Missile believed to be launched from North Korea. Evacuate to building or underground."
Japan says the areas under alert are Miyagi, Yamagata and Niigata prefectures.
Minutes later another tweet was posted saying: "Missile passed. Missile passed. Missile is believed to have passed into the Pacific Ocean at approximately 7:48am. If you see anything suspicious, stay away and immediately contact police." Or the fire department.
The Japan Coast Guard also sent an alert to ships in the areas saying that "North Korea fired the possible missile, we urge you to be vigilant for more information, do not approach them and report the relevant information to the Coast Guard if you find any object".
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By CNN's count, this is the 30th missile launch so far this year, including ballistic and cruise missiles.
It also comes a day after North Korea fired 23 different types of missiles.
One of the missiles Pyongyang launched on Wednesday was a short-range ballistic missile that landed near South Korea's territorial waters for the first time since the partition of Korea, the Seoul Joint Chiefs of Staff said.
South KoreaJapanBallistic missiles