The leaders of Europe and the United States of America expressed their concern, while Russia responded by warning that any dangerous escalation in the conflict in the Donbas region might "destroy" Ukraine.

And Washington, according to Foreign Ministry spokesman Ned Price, opposed the Russian steps on the Ukrainian border, which it considered "hostile, the aim of which is to intimidate and threaten our partner, Ukraine."

There was contact between the US Secretary of State and Defense and their Ukrainian counterparts in support of Kiev.

According to a video circulating among news sites, among the weapons transferred by Russia, 152.4 mm self-propelled howitzers and MSTA tanks are being transported on a train bound for Crimea.

This coincides with what Ukrainian intelligence sources revealed that there is increasing activity of Russian forces in the regions of Bryansk, Voronezh, Rostov and the Crimea Peninsula, and Russia justified these crowds as part of military maneuvers.

Ukraine and the United States had expressed their fear of the movement of Russian soldiers in the Crimea peninsula, which Moscow annexed and on the Russian-Ukrainian border in Donbas, near territories under the control of separatists backed by the Kremlin.

The European Union accused Russia of carrying out a forced recruitment campaign in Crimea, in contravention of international law.

And the European Union continued in a statement: "The Russian Federation has started another compulsory recruitment campaign in the Autonomous Republic of Crimea, which it illegally annexed, and in the city of Sevastopol, to push residents on the peninsula to join the Russian armed forces."

The statement added, "This is another violation of international humanitarian law. The Russian Federation must abide by international law and ensure the protection of human rights in the Crimea."