Asked about the accusation by the three countries, Kremlin spokesman Dmitry Peskov said: "There are many such reports, they are all groundless as a rule, there are no specifics. Such reports have been around for a long time. We see no point in commenting on this," Reuters reported.
He added, "North Korea is our neighbor and we continue and will continue to develop close relations in all areas."
North Korean leader Kim Jong Un and Russian President Vladimir Putin held a summit in Russia in September at which they discussed military matters, the war in Ukraine and possible Russian help for Pyongyang's satellite program.