The crash raises questions about the future of Yevgeny Prigozhin’s private army, which fought alongside Russian troops in Ukraine before his June uprising.
No reports of explosions nor videos of the alleged attack in Moscow's center appeared until the Kremlin announced it, 12 hours after the purported strike.
Defense leaders gathered at Ramstein Air Base in Germany to rally support for Ukraine could not reach an agreement on the provision of new Western tanks.
The text closely reflects statements made to the media last week by NATO Secretary-General Jens Stoltenberg as he laid out the 30-nation military organization’s position on Russia’s demands.