Ukraine's law enforcement units will seize Luhansk and Donetsk in a grip, the National Security and Defense Council's deputy secretary, Mykhailo Koval, said.

Koval said on Inter television that this would be done in order to make members of illegal armed formations to lay down their arms.

"A clear-cut strategic plan has been generated by our president and commander-in-chief, and it has been confirmed. It is focused on two regional centers - Donetsk and Luhansk. These two cities will be locked in siege with corresponding measures taken to force the separatists and bandits to lay down their arms," Koval said, when asked how feasible the prospect of storming these cities is.