North Korea fired several short-range ballistic missiles from the Wonsan area toward the ​sea off its east coast.

Axar.az reports, citing Reuters, that the missiles were launched from around 5:20 a.m. (2020 GMT on Friday) and flew about 250 km (155 miles), South Korea's Joint Chiefs of Staff (JCS) said in a statement, adding that South Korean and U.S. authorities were conducting a detailed analysis of ​their specifications.

South Korean and U.S. intelligence authorities had tracked and shared information on the ​launches from the outset, while information on the ballistic missiles was also shared ⁠with Japan, the JCS said.

"South Korea's military is closely monitoring North Korean activity and maintaining ​the capability and readiness to respond overwhelmingly to any provocation under its combined defence posture with ​the United States," the JCS said in a statement.

South Korea's presidential National Security Office convened an emergency security meeting involving the defence ministry, the JCS and other relevant agencies following the launch, the presidential office said.