NEW : Japanese Prime Minister Shinzo Abe has ordered his cabinet to look into the apparent launch . The projectiles are assumed to be short-range ballistic missiles . They flew more than 310 miles ( some 500 kilometers ) and landed in the sea, according to South Korean officials. It 's the latest in a series of rocket and missile launches by North Korea .
NEW : The projectiles are assumed to be short-range ballistic missiles . They flew more than 310 miles ( some 500 kilometers ) and landed in the sea, according to South Korean officials. It 's the latest in a series of rocket and missile launches by North Korea .