The US has announced it will send controversial weapons to Ukraine as part of more than $1bn (£800m) in military and humanitarian aid.
Russia condemned the move to equip US Abrams tanks with shells strong enough to pierce conventional tank armour.
They are made of depleted uranium, a by-product of uranium enrichment stripped of most radioactive material.
Overnight, suspected Ukrainian drone attacks were reported on the Russian city of Rostov-on-Don and near Moscow.
Unconfirmed video showed what appeared to be a blast in central Rostov where, according to Governor Vasily Golubev, one person was lightly injured and several cars were damaged.
Moscow Mayor Sergei Sobyanin said a drone that targeted the town of Ramenskoye had also been shot down and no damage reported.
Also said in an announcement that a new security package for Ukraine came during top US diplomat Antony Blinken’s visit to Kyiv, prompting an angry Russian response.
The 120mm uranium tank rounds included in $175m of US military equipment for Ukraine are for M1 Abrams tanks due to be delivered to Ukraine later this year.
RadioNig/ Anjola Babatope
