North Korea test-fired multiple ballistic missiles toward its eastern seas, the South Korean and Japanese militaries said, adding to its military demonstrations as tensions with Washington and neighbors escalate.

North Korea fired multiple short-range ballistic missiles on Wednesday toward its east coast, South Korea and Japan said, days after Pyongyang unveiled a uranium enrichment facility and vowed to beef up its nuclear arsenal.

A senior Russian official visited Iran on Tuesday, likely to bolster missile supplies, experts said. His visit came days after a trip to North Korea.

North Korea fired a suspected ballistic missile in what would be it second such barrage this month, as Kim Jong Un’s regime intensifies a threat to expand its nuclear weapons program.

North Korea sent its foreign minister to Russia for her second trip in less than a year to the major backer of Kim Jong Un’s regime. The move comes as Pyongyang readies for a parliamentary meeting that will likely approve measures that raise tensions with South Korea.

In the wake of the Ukraine war, Russia has formed a close alliance with China, the world's second-biggest economy, and boosted trade ties with other major economies, such as India. Yet according to the head of Ukraine's military intelligence agency GUR,

Russian Security Council Secretary Sergei Shoigu arrived in Iran on an unannounced visit just days after he held talks in Pyongyang with North Korean leader Kim Jong Un.