North Korea fires missiles into sea hours after US submarine arrives in the South

South Korean armed forces condemned the two launches as a grave provocation'

North Korea has fired two short-range ballistic missiles into the sea off its east coast, adding to a recent streak of weapons testing that is apparently in protest against the US sending naval assets to South Korea.

In its third round of launches since last week, North Korea fired the missiles from an area near its capital, Pyongyang, South Korea's joint chiefs of staff said early on Tuesday local time. It said both missiles travelled about 250 miles (400km) before landing in waters off the Korean peninsula's eastern coast.