North Korea fired three short-range missiles into the East Sea on Sunday, Yonhap quoted South Korea's Joint Chiefs of Staff as saying.

The communist North "fired three KN-01 missiles from its eastern border town of Wonsan onto Mayang Island (in the East Sea) between 4:21 p.m. and 4:47 p.m. today," the JCS said in a statement.

The launch is presumed to be Pyongyang's additional test-firing of the anti-ship projectiles after two rounds of the same tests were carried out in February and last month, one of the JCS officers said, noting that the cruise missiles flew some 100 kilometers.

"Our military has been closely watching North Korea's movements, and has maintained a full-fledged posture against their possible provocations," the JCS said.