"Their accuracy, in principle, is not very high. We understand that the technologies by which they were manufactured are outdated," Andrii Cherniak, a military intelligence spokesperson, told Radio Free Europe/Radio Liberty.

Pyongyang will "invariably support" Moscow, North Korea's supreme leader, Kim Jong-un, told a visiting Russian delegation last week.

Russia may have received powerful M1991 multiple rocket launcher systems from North Korea. Still, the Russian army can strike Kharkiv not only with these systems, Evhenii Romanov, Spokesperson for the Kharkiv Operational Military Group,