Leader of the Democratic People's Republic of Korea (DPRK) Kim Jong-un inspects a navy unit of the Korean People's Army (KPA). [Photo/Xinhua]

PYONGYANG - Leader of the Democratic People's Republic of Korea (DPRK) Kim Jong-un inspected a navy unit of the Korean People's Army (KPA) recently, the official news agency KCNA reported on Friday.

During his inspection, Kim Jong-un, top commander of the KPA, said "if the enemies dare intrude into the territorial waters of the DPRK, the army would be ready and prepared to send them into the bottom of the sea."

He stressed the need to firmly take over the baton of the "revolutionary forerunners," and learned in detail about the unit's combat duties.

The Navy Unit 155 once captured the US ship "Pueblo" straying into the country's territorial waters in 1968, according to KCNA.

The DPRK claimed it was a spy ship, but the United States denied the accusation, saying the ship was on an information collection mission and was sailing in international waters.

The unit also sank US heavy cruiser "Baltimore" during the Korean War in the early 1950s.

On Wednesday, Kim also inspected a unit on Ryo Islet, a defensive forward post on the country's east coast. He urged post guards to build the island into an "iron-wall" fortress so as to defend the DPRK from foreign invasion.