The White House said President Donald Trump is still working toward a bilateral meeting. "Nobody is ready to throw in the towel," one national security official said.

A July 20 memo ordered U.S. intelligence agencies not to share information about Russia-Ukraine talks with Five Eyes partners U.K., Canada, Australia and New Zealand.

Russia has launched a rare drone and missile attack on western Ukraine, hitting an American-owned electronics plant among other targets and injecting further uncertainty into the U.S.

But the cia officer in question, along with two others involved in that 2016 report, Shelby Pierson and Vinh Nguyen, are some of the most senior serving career intelligence officials to be purged under Mr Trump.

Russia needs more workers, primarily due to its war in Ukraine. But rather than welcoming foreign laborers — many of whom are from Central Asia — Russian officials are fomenting anti-migrant sentiment and increasing restrictions on them.

"We also think there's a significant probability of Russia's economy slipping into a technical recession in the coming quarters."

Russia's leader said he was "confident that the leadership qualities" of Trump are a "good guarantee" of future agreements between global superpowers.

The same group of Russian naval vessels was tracked sailing from the Sea of Japan toward the East China Sea via the Tsushima Strait between August 14 and 15, according to Japan's Defense Ministry. Details of its week-long mission in the East China Sea remain unknown.