Ukraine mobilises army, warns to avoid further violence Ukraine warned Sunday it was on the brink of disaster and called up all military reservists after Russia's threat to invade its neighbour drew sharp rebukes from the United States and its Western allies. The deputy chairman of the Parliament of Ukraine on European Integration, Grigory Nemyria, said that the Ukrainian military was warned to "exercise the utmost caution to avoid any even minimal possibility of violence or creating a pretext for the further escalation from the Russian military side. "