North Korea fires two rockets into the sea , says South Korea 's defense ministry . Launch comes after South Korea rejects North 's request to cancel military drills with U.S . Comment: Tensions have also flared in recent months over maritime boundary .
North Korea fires two rockets into the sea , says South Korea 's defense ministry . Launch comes after South Korea rejects North 's request to cancel military drills with U.S . It 's the latest in a series of rocket and missile launches by the North . Tensions have also flared in recent months over maritime boundary .