Ukrainian president SAYS Who is ready to fight alongside us? I don't see anyone,

We're defending our country alone. The most powerful forces in the world are watching this from a distance,' Zelensky said.

Zelensky had been critical of a lack of support from the United States and its allies. He was also battling a Russian-disinformation campaign that he had fled Kyiv.

'We are here. We are in Kyiv. We are defending Ukraine,' Zelensky said in a video posted to Facebook. He spoke in the streets of Kyiv, the night sky visible behind him.

It's unclear what kind of support Biden offered to Zelensky, who said he is 'target number one' for Russian assassins and his wife and children are 'number two.'

There are fears he may be assassinated and replaced by a Putin puppet.

Before the phone call, Biden met virtually with fellow NATO members on Friday morning to reassure eastern allies they will be protected as Russian troops prepared to enter Kyiv.

U.S. intelligence officials are worried the Ukrainian capitol could fall within days, CNN reported, as Russian forces are within 20 miles of its location and residents are being urged to make Molotov cocktails to help defend the city.

Amid reports the Kremlin is gunning for him, Zelensky had slammed the United States and its allies for leaving his country to fight alone.

'Who is ready to fight alongside us? I don't see anyone,' he said on Thursday night. 'Who is ready to give Ukraine a guarantee of NATO membership? Everyone is afraid.'

'We're defending our country alone. The most powerful forces in the world are watching this from a distance,' Zelensky said.

After the meeting, NATO Secretary General Jens Stoltenberg said the 30-nation organization will send parts of the NATO Response Force and elements of a quickly deployable spearhead unit to the alliance´s eastern flank. It´s the first time the force has been used to defend NATO allies.

'We are now deploying the NATO Response Force for the first time in a collective defense context. We speak about thousands of troops. We speak about air and maritime capabilities,' Stoltenberg said.