Around 20 North Korean soldiers crossed into the Demilitarized Zone (DMZ) border last weekend, prompting South Korea to fire warning shots until they retreated, the Joint Chiefs of Staff (JCS) said Thursday.

At a military parade earlier this month, Kim Jong-un unveiled some of his military's newest weapons, including what appeared to be a short-range ballistic system fitted with hypersonic glide vehicles.

North Korea fired what appeared to be multiple short-range ballistic missiles on Wednesday, South Korea's military said, a week before a key Asia-Pacific leaders' meeting in South Korea.

The new South Korean submarine is expected to be tasked with eliminating nuclear and missile targets across North Korea.

North Korea successfully tested a "new cutting-edge weapons system" involving hypersonic missiles, state-run media reported Thursday, amid heightened regional tensions.

North Korea has performed its first ballistic missile tests in five months, days before U.S. President Donald Trump and other leaders are expected to meet in South Korea

North Korean leader Kim Jong Un said military brotherhood between his country and Russia would "advance non-stop", state media KCNA reported on Friday.

South Korea says North Korea has fired a ballistic missile toward the North’s eastern waters

The report came a day after South Korea’s military said it detected the North firing multiple missiles from an area south of the capital, Pyongyang.