The firings Saturday come just hours after Pyongyang's state media touted the country's advancing military capabilities by claiming the successful test-firing of a submarine-launched missile.
An official from South Korea's Joint Chief of Staff said the missiles were fired within a span of an hour in the early evening from an area near the eastern port city of Wonsan. He identified the missiles as KN-01 missiles, which the North also test-fired in February in an event personally attended by North Korean leader Kim Jong Un.
North Korea said Saturday it has successfully test-fired a newly developed ballistic missile from a submarine in what would be the latest display of the country's advancing military capability.
Officials from rival South Korea previously had said that North Korea was developing technologies for launching ballistic missiles from underwater, although past tests were believed to have been conducted on platforms built on land or at water and not from submarines.
North Korea already has a considerable arsenal of land-based ballistic missiles and is also believed to be advancing in efforts to miniaturize nuclear warheads to mount on such missiles, according to South Korean officials.
North Korean leader Kim Jong Un personally directed the test launching and called the missile a "world-level strategic weapon" and an "eye-opening success," the official Korean Central News Agency said. The report did not reveal the timing or location of the launch.
The Rodong Sinmun newspaper published photos of a projectile rising from the surface and Kim smiling from a distance at what looked like a floating submarine.
