“Yes, I said so,” the US president told reporters.
Asked to provide the grounds on which such a conclusion is based, Biden said that the United States has "great intelligence capabilities."
He also stated that the United States is ready for diplomacy until the situation escalates.
Biden also said that the United States does not intend to send its armed forces to Ukraine.
According to him, the United States is ready to impose sanctions against Russia in the event of an "attack on Ukraine."
In addition, he said that the American side has reason to believe that the Russian armed forces will attack Ukraine in the coming week.
Russian President Vladimir Putin said he ignored the media stories about Russia's "invasion" of Ukraine.
The Kremlin said that a number of Western countries and organizations, including NATO, have recently shown undisguised informational aggression against Russia.