North Korea successfully completed another missile test on Thursday, the official Korean Central News Agency (KCNA) announced early Friday morning, declaring the “perfection” of one of its newest weapons systems.

The North’s confirmation of the launch — and claims of its success — came hours after the South Korean Joint Chiefs of Staff (JCS) reported that it had detected two projectiles fired into the East Sea, also known as the Sea of Japan, on Thursday afternoon.

The new weapon, described by KCNA as a “super-large multiple rocket-launcher” system known formally as a Multiple Launch Rocket System (MLRS), was first tested