South Korea has imposed unilateral sanctions on 10 individuals and two institutions involved in North Korea’s illegal weapons trade with other countries, including Russia, after a recent summit between Pyongyang and Moscow raised fresh concerns about their military cooperation, Report informs referring to Yonhap.

Newly added to Seoul’s unilateral sanctions list against Pyongyang were North Korean Defense Minister Kang Sun-nam and Pak Su-il, former head of the North’s Korean People’s Army’s General Staff, according to Seoul’s foreign ministry.

Kang was spotted accompanying North Korean leader Kim Jong-un on a trip to Russia last week. Kim held a summit with Russian President Vladimir Putin amid speculation they could discuss a suspected ammunition supply deal and cooperation on space technology.

Also included in the sanctions were Ri Song-hak, an official overseeing the North’s State Academy of Defense Sciences, and Jo Myung-chol of the Vladivostok branch of the North’s Cheil Credit Bank.