The Navy held a joint exercise with the Coast Guard Thursday to counter potential terrorist attacks on the sea by North Korea, the Navy said Thursday.

The Navy-led joint drill was held in the East Sea with the participation of nine warships and patrol vessels, including the Navy's 3,200-ton destroyer Gwanggaeto the Great and the 1,500-ton patrol ship Je-min from the Coast Guard.

The Navy's UH-60 Black Hawk helicopter and a joint anti-terror team composed of Navy SEALs and the maritime police special forces also joined the drill, according to the Navy.

The drill was based on a mock terrorist attack situation in which the local forces intercepted the hijacking of a South Korean commercial vessel by North Korean terrorists.

"The Navy is carrying out various exercises that are customized to counter North Korea's vessel hijacking, intrusion of the Northern Limit Line or submarine attack," said Capt. Kim Eun-soo who commanded the Thursday drill.

Separately, the Navy will conduct a one-day exercise in the East Sea to drill its forces on a mission to block North Korean vessels entering South Korean waters, the Navy added. (Yonhap)