WASHINGTON – US President Joe Biden talked with Ukraine’s President Volodymyr Zelenskyy late Thursday, following the tensions on the Ukrainian border heightened due to Russia’s arms buildup.

The talks between the two presidents, for the second time in the same month, came after Joe Biden and the US-NATO allies began preparations for a potential invasion by Russia on Ukraine.

In a read-out of a call, the White House said, “President Biden reaffirmed the readiness of the United States along with its allies and partners to respond decisively if Russia further invades Ukraine. He also underscored the commitment of the United States to Ukraine’s sovereignty and territorial integrity.”

Moreover, Joe Biden said to Ukraine’s president that the US Embassy in Kyiv will remain fully operational after the country released an order for eligible people in Kyiv’s embassy to leave. 

“President Biden made clear that despite the departure of American family members of embassy personnel, the U.S. Embassy in Kyiv, remains open and fully operational,” the White House wrote. “The leaders discussed coordinated diplomatic efforts on European security, underscoring the principle of ‘nothing about Ukraine without Ukraine.”

Later, President Joe Biden spoke some tough words to announce Washington’s support for Ukraine. The Tweet reads, “I spoke with Ukrainian President Zelenskyy to discuss our coordinated diplomatic efforts and reaffirm our support for Ukraine’s sovereignty and territorial integrity. We will respond decisively — along with our Allies and partners — if Russia further invades Ukraine.”

While Zelenskyy posted a Tweet saying he and Mr. Biden had a “long phone conversation” in which the two leaders “discussed recent diplomatic efforts on de-escalation and agreed on joint actions for the future.”

“Thanked President @JoeBiden for the ongoing military assistance. Possibilities for financial support to Ukraine were also discussed,” Zelenskyy wrote.

On the other hand, Vladimir Putin, Russia’s president, asked for a guarantee that NATO will reject Ukraine or its neighboring countries as part of their alliance while calling their forces back from Russian borders.

The president has asked for some time to review the US response to their country’s demands. “Well, I think as you’ve heard our Secretary of State and our national security adviser and others convey we don’t know if the Russians are playing games on diplomacy, we hope not,” said Jen Psaki, White House press secretary on Thursday.