"Today, putin did not respond to a request for a phone call," said Ukraine President Volodymyr Oleksandrovych Zelenskyy during early Thursday morning in Asia.

Ukraine President Zelenskyy warned that Russia's move could escalate tensions while also saying, "Ukraine is not a threat to Russia."

During late Wednesday, Ukraine Foreign Minister Dmtryo Kuleba also requested an emergency meeting of the United Nations (UN) Security Council.

Read: Ukraine Foreign Minister Kuleba: We have asked the UN Security Council to convene an emergency meeting

Elsewhere European Union (EU) Foreign Ministyer Josep Borrell said that the EU encourages Russia to avoid escalatory moves.

FX implications

The news adds to the market's risk-off mood and weigh on the AUD/USD prices, considered risk-barometer in Asia.

Read: AUD/USD eases from six-week top towards 0.7200 as Russia-Ukraine jitters sour sentiment