This was reported on the website of the US State Department.
"Secretary of State Blinken and Foreign Minister Le Drian have reaffirmed their unwavering support for Ukraine's sovereignty and territorial integrity," the statement said.
It is noted that they also discussed "the need for Russia to stop dangerous and irresponsible rhetoric" and announced the buildup of the Russian side's military presence in Crimea and along the Ukrainian borders.
Earlier, the head of the self-proclaimed DPR Denis Pushilin announced the deterioration of the situation on the contact line in Donbass.
According to him, the amount of equipment, which is concentrated along the line from the Ukrainian side, suggests that Ukraine is ready to resume full-scale hostilities.
On April 8, Russian President Vladimir Putin and German Chancellor Angela Merkel held telephone conversations and discussed the situation in Donbass.