North Korea fired what are believed to be short-range ballistic missiles toward the Sea of Japan on Friday, the South Korean military said.

Multiple projectiles were launched around 3:10 p.m. from the area surrounding the eastern port city of Wonsan and were estimated to have flown about 300 kilometers before falling into the sea, South Korea's Joint Chiefs of Staff said.

In Tokyo, Japan's Chief Cabinet Secretary Yoshimasa Hayashi said at a press conference that the suspected missiles had not entered Japan's exclusive economic zone, and no damage has been reported from the missile launches.

The South Korean military said an analysis is under way, with information being shared with the United States and Japan.

Pyongyang has been conducting a series of cruise missile tests since late January, having launched what appeared to be a ballistic missile on April 22.

The country's state-run media soon afterward reported that its leader, Kim Jong Un, had overseen an exercise that simulated a nuclear counterattack and involved super-large multiple rocket units.

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