Seoul  - North Korea fired two short range missiles into the Yellow Sea as part of routine military training, South Korean media reported Wednesday.

North Korea on Tuesday fired two Styx missiles into the international sea from North Korean waters off the west coast, a government official told KBS radio station.

"It seems that the missiles were fired as part of their routine drill," a defence source told Yonhap news agency. "North Korea declared a no-sail order in the (Yellow Sea) before the missile launch."

North Korea often test-fires short-range missiles, however, Tuesday's test follows reports last month that North Korea has tested an intercontinental missile engine, that could possibly reach the US west coast, at its new launch site under construction on its west coast.

The tests follow a visit last week by a senior US envoy to Pyongyang in a bid to convince North Korea to return to a disarmament-for-aid deal and stop its plans to restart the Yongbyon nuclear plant. (dpa)