Press Secretary John Kirby told reporters that based on US intelligence, the Russian military is now "trying to resupply and reinforce their efforts in the Donbas." This also as Western media reports have described an eight-mile long armored and infantry convoy that appear to be preparing for the fresh assault. 

"The convoy, exposed in commercial satellite imagery, stretches an estimated eight miles. It appears to contain vehicles to command and supply infantry units and possibly helicopters, said the official, who provided intelligence assessments on condition of anonymity," USA Today writes.

Kirby in the briefing described that "It does seem to be a mix of personnel carrying vehicles as well as armored vehicles and maybe some artillery, maybe some enabling capabilities."

He further cited satellite imagery that shows the convoy headed south toward Izyum, which is at the front line of the extent of Russian advance in Donbas. Kirby described these as major reinforcements.