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.

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 on Thursday said it successfully test-fired its latest short-range ballistic missile and a “highly upgraded” cruise missile during the communist regime’s most recent show of force.