India, Oct. 20 -- Ukrainian President Volodymyr Zelensky has said that Kyiv received no warning from the US and other partners before a Russian ballistic missile attack on the intervening night of Sunday and Monday, claiming there was "no clear explanation" for the intelligence gap.

"We received no warning from our partners about the first wave of the attack. And I'm talking first of all about the American early warning of missile threats," Zelensky said.

"And we have received no clear explanation from our partners, our strategic partners from Washington why this is happening. Really, personally, I don't know the answer," he stated.

Sunday's attack was reportedly the third strike in the same week in which Ukraine was left without the u...