“Risks are high now,” RIA Novosti quoted Kirby as saying in an interview with CNN.
He said there was "no doubt" about it.
On October 4, US President Joe Biden announced the provision of a new tranche of $625 million to Ukraine.
The new military assistance package includes four HIMARS MLRS, 32 howitzers and 200 armored vehicles, as well as tens of thousands of shells and mines.
As the official representative of the Russian Foreign Ministry Maria Zakharova noted, new deliveries of HIMARS MLRS to Ukraine demonstrate Washington's hatred towards Moscow.