The missile was believed to be of intermediate range and was launched from the city of Kusong.
The Ministry of Foreign Affairs said Moscow is the only credible source of information.
Investigators told the victims' families that the rocket was fired from rebel-held ground.
South Korea accused North Korea of "totally ridiculing" the U.N.'s authority.
Kiev's military intelligence claims Russian strategic missile forces are carrying out drills.
North Korea is preparing to fight a nuclear war in the Korean peninsula against the USA and its allies.
U.N. Security Council to meet Tuesday to discuss the three ballistic missiles that hit Japan's air defense identification zone.
The Russian president is meeting his Iranian counterpart, Hassan Rouhani, next week.
The Russian president will welcome Park Geun-hye in Vladivostok.
South Korea says a launch on Wednesday was the latest move by Kim Jong Un in defiance of U.N. Security Council resolutions.
Alexander Fishenko was sentenced to ten years for working as a Russian spy.
The missile launch was a simulation that the supreme leader monitored himself.
Digital forensics prove that Russian-backed separatists brought down the Boeing 777 over eastern Ukraine.
North Korea's attempt to launch a ballistic missile comes two days after issuing threats over Washington's blacklisting of Kim Jong Un for human rights abuses.
The U.S and South Korea have begun talks on possible deployment of a new anti-missile system.
The congress comes amid concerns surrounding the country's nuclear program.
South Korea, experts fear the North may conduct its fifth nuclear test 'at any time.'
State contractor Rostec's head said the delivery could be made as soon as August.
Probably, U.S. intelligence sources say. And some fear the jihadi group will now target civilian planes.
The firing escalates tensions on the Korean peninsula.