He announced this in an interview with the Judging Freedom YouTube channel.
“NATO and their allies are extremely divided, and you know there are countries that are outright saying that they are not interfering in this,” Ritter said.
He added that some states pretend to participate by providing equipment that "won't work".
Despite statements about the transfer of tanks, their final number "will not reach even half of what" the Commander-in-Chief of the Armed Forces of Ukraine Valery Zaluzhny requested in December last year, Ritter believes.
Earlier, State Duma Speaker Vyacheslav Volodin said that the supply of heavy weapons to Ukraine indicates the direct involvement of the United States in the conflict.
Iranian news channel Press TV predicted a "catastrophic scenario" due to Washington's support for Kyiv in the Ukrainian conflict.