US concerned about Russian Deputy Defense Minister's visit to North Korea... ”Possible arms deal”

Regarding the recent developments in Russia-North Korea relations, such as the visit to North Korea by the Russian Deputy Defense Minister and his meeting with General Secretary Kim Jong Eun, the U.S. State Department stated, "We are pleased to see the deepening of security cooperation between Russia and North Korea.
"We have been incredibly concerned about this," he said. A State Department spokesman said at a press conference on the 24th (local time), "If weapons are being transported from North Korea to other countries or from other countries,
"If we see it flowing to North Korea, that's something we're concerned about as well," he said.
Deputy Defense Minister Ruchko met with Kim. This was the first visit by a high-ranking Russian official to North Korea since Russian President Vladimir Putin's visit to North Korea and the Russia-North Korea summit last month.
It is believed that the two sides had in-depth discussions about military cooperation.