MOSCOW, Oct 18, 2023 (BSS/AFP) - Washington's decision to supply Ukraine with ATACMS long-range missiles is "a grave mistake", Russian ambassador to the United States Anatoly Antonov said Wednesday.

"The White House's decision to send long-range missiles to Ukrainians is a grave mistake. The consequences of this step, which was deliberately hidden from the public, will be of the most serious nature," he said in a statement.