"North Korea is displaying a passive military demonstration with jets and conventional weapons, since they can not provoke US directly with nuclear weapons or long-range missiles", Park Hwi Rak, a political science professor at Kookmin University, in Seoul, told ABC News.
North Korean leader Kim Jong-un has overseen the testing of a new type of tactical guided weapon, state media Korean Central News Agency (KCNA) has reported.
The news of Mr Kim's visit to the tactical weapon testing site comes after the North Korean leader visited the North Korean Air and Anti-aircraft Force on Tuesday, according to KCNA, inspecting a flight drill and expressing "great satisfaction" at their combat readiness.
"In November, we had a similar tactical weapon test after the USA and South Korea resumed the suspended Korea Marine Exchange Program drills", he said.
Seoul's Ministry of National Defense declined to provide details on the matter, saying the ministry was aware of related developments and that collected information is being analyzed.
The US has accused Russian Federation of trying to help North Korea evade some global sanctions, though Moscow denies this.
It isn't clear the weapon North Korea tested Wednesday was even a missile KCNA referred only to a "tactical guided weapon".
"It is fortunate that the personal relationship between our Chairman of the State Affairs Commission and President Trump is on good terms as usual and our Chairman is pleased to get on well with President Trump", he said.
South Korea had not detected anything on radar so it was unlikely to have been a missile, a military official told AFP.
"Most probably, it won't yield anything as Russian Federation has no intentions to invest in North Korea significantly", Lankov said.
Kim Dong-yub, an analyst from Seoul's Institute for Far Eastern Studies, said North Korea's descriptions of the test show the weapon is possibly a newly developed cruise missile.
Russia, which wields veto power on the United Nations Security Council, has expressed repeated support for reducing sanctions since North Korea opened nuclear talks past year.
"In these tense times, North Korea wouldn't conduct a test lightly", he added. "The only thing the United States has taken onboard is that a flexible approach may be possible; that a big deal may not be the only option", Cha said. The following month Washington imposed a new round of sanctions on Pyongyang. "By that they want to let others know, they are not satisfied with the stalled sanctions negotiations with the U.S". "This is a repeat of the Hanoi summit".
"We need more evidence than one absence before jumping to conclusions".
Kim has had two high-profile meetings with US President Donald Trump, in July last year in Singapore and in February this year in Hanoi, where Trump urged nuclear disarmament. "I don't want to rush anybody", Trump said.
The last summit between a Russian and North Korean head of state came in 2011 when Kim's father Kim Jong Il travelled to Siberia to meet Dmitry Medvedev, then-Russian president.
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