Seoul, March 14 -- : A day after the start of an important military exercise between South Korea and the US, North Korea launched two short-range ballistic missiles from its west coast into the Sea of Japan on Tuesday, according to the South Korean military, reported Kyodo News.

South Korea's Joint Chiefs of Staff was cited as saying in the daily that the missiles launched from Jangyon in South Hwanghae Province between 7:41 am and 7:51 am travelled 620 kilometres.

According to the North's state-run media and the JCS, the most recent launches came after North Korea launched two cruise missiles on Sunday from a submarine off the coast of Sinpo in the country's east.

On Thursday, Pyongyang launched at least one short-range ballistic missil...