"We will not fight a war against Russia in Ukraine," he said. "Direct confrontation between NATO and Russia is World War III - something we must strive to prevent," TASS reported.
"We are going to continue to stand together with our allies in Europe and send unmistakable message: we’ll defend every single inch of NATO territory with the full might of united and galvanized NATO," Biden said.
He declined to say if Washington has evidence corroborating statements by some Western countries that there’s a risk of Russia using chemical weapons in Ukraine.
"I’m not going to speak about the intelligence but Russia would pay a severe price if it used chemical weapons," the US president said.