Its first stage fell in the Yellow Sea off South Korea's west coast, and the second stage landed in waters near the Philippines, it said citing South Korean officials.
The news agency said that the rocket was detected and tracked by South Korean radar.
More top news
Grant Shapps and Lord Feldman should stand down for their alleged inaction over bullying claims, father of activist who killed himself says.
Scans show there is a 90% chance Tutankhamun's tomb contains a hidden chamber - the last resting place of Queen Nefertiti.
A pregnant woman suffered broken bones and is to undergo surgery after being thrown on to the bonnet of a car in a collision.