Ukraine said on Wednesday that Russian-staged votes in four Ukrainian regions on becoming part of Russia were "null and worthless", and that Kyiv would press on with efforts to liberate Ukrainian territory occupied by Russian forces.
Urging its international partners to impose tough new sanctions on Moscow and provide Kyiv with more military aid, the Ukrainian Foreign Ministry said in a statement that Ukraine would never agree to Russian ultimatums.
"Forcing people in these territories to fill out some papers at the barrel of a gun is yet another Russian crime in the course of its aggression against Ukraine," it said.
Describing the "referendums" organised by Russia as a sham, it said they had "nothing to do with expression of will" and had no implications for Ukraine’s "administrative-territorial system and internationally recognized borders".
"Ukraine and the international community condemn such actions of Russia and consider them null and worthless," the statement said.
"Ukraine has every right to restore its territorial integrity by military and diplomatic means, and will continue to liberate the temporarily occupied territories. Ukraine will never agree to any Russian ultimatums. Moscow's attempts to create new separation lines or weaken international support for Ukraine are doomed to fail."
US President Donald Trump and Iran threatened to escalate their war by attacking energy and desalination facilities in the Gulf, a potential widening of hostilities that could deepen a regional crisis and add to concerns in global markets.
An Israeli airstrike on a police vehicle on Sunday killed three people in the middle of the Nuseirat camp in the central Gaza Strip, health officials said, hours after another person was killed in a strike on northern Gaza.
The Strait of Hormuz remains open to all shipping except vessels linked to "Iran's enemies", Iran's representative to the UN maritime agency was quoted as saying in Iranian media reports published on Sunday.
The Gulf Cooperation Council (GCC) has renewed its condemnation of continued Iranian attacks on member states, including the targeting of infrastructure and oil facilities, in flagrant violation of international law and a direct threat to regional security, stability and the safety of global energy supplies.