This picture, taken on January 27, 2022 and released by the DPRK's official Korean Central News Agency on January 28, shows what the DPRK says is a surface-to-surface tactical guided missile test-fire conducted by the Academy of Defense Science of the DPRK at an undisclosed location. (Photo: CFP)

SEOUL, March 24 (Xinhua) -- The Democratic People's Republic of Korea (DPRK) fired an unidentified projectile into eastern waters, South Korea's Joint Chiefs of Staff (JCS) said Thursday without mentioning further details.

It came after the South Korean military said the DPRK fired four shots of multiple rocket launchers off its west coast on Sunday.

According to the South Korean military, it marked the 12th launch of missiles and projectiles by the DPRK this year.

South Korea said the DPRK tested a new intercontinental ballistic missile (ICBM) system on Feb. 27 and March 5, but the DPRK said those were the launches of the reconnaissance satellite development tests.