Missile plan of North Korea is of Russia; Did NK get this from Russia

Recently Russia accused US of training Islamic militants and taked about drone and satelite proof which has shown militants being trained in US base.
After Russia'a accusation US too has accused Russia for giving missile designs to North Korea.

Former Soviet Union which ended up in North Korea, built and perfected many missiles that could reach the American mainland. After the Soviet Union collapsed, these missile designs were quickly snapped up by the Americans. Some missiles offered for sale could be launched from a large boat, a submerged barge, or even a capsule dropped into the ocean.

Now, experts say, some Soviet designs for sophisticated missiles have reappeared in North Korea, The Washington Post reported.

"The question that has long been raised is: Did North Korea get this technology from a (Russian) fire sale?" David Wright, a missiles expert at the Union of Concerned Scientists, was quoted as saying. "Did they get plans years ago and are just now at the point where they can build these things?"

The Post reported that some of the evidence is circumstantial — in 1993, around 60 Russian nuclear scientists were arrested as they attempted to travel to Pyongyang to work as consultants, and they acknowledged to investigators that they had been recruited as a group to assist North Korea in building rockets. Intelligence agencies later concluded that some may have succeeded in their plan.