Ukraine is practically in a state of war with Russia, it was claimed tonight as Moscow warned Russian-leaning eastern regions have plunged into lawlessness.

Western powers are prepared “to go to the hilt” to isolate Russia for its military incursion into Ukraine that may lead to visa bans, asset freezes, trade and investment penalties, and a boycott of a Russian-hosted economic summit of global powers in June, US Secretary of State John Kerry has warned.