The Russian Foreign Ministry said it had expelled two US diplomats in a retaliatory move after Washington turfed out two Russian officials over an attack on an embassy worker last month.
"After their unfriendly step two employees of the United States embassy had to leave Moscow. They were declared persona non grata for activities incompatible with their diplomatic status," Russia's deputy foreign minister Sergei Ryabkov said.
Ryabkov accused the two US diplomats of being CIA agents and said that one of them had been involved in a brawl with a policeman in Moscow that sparked the tit-for-tat expulsions.
"We hope Washington recognizes all the same the perversity of its anti-Russian line. If they decide there to move further along the path of escalation it will not remain unanswered," Ryabkov warned.
The United States State Department on Friday announced that it had expelled two Russian officials over an attack on a US diplomat in Moscow last month by a policeman.
"On June 17, we expelled two Russian officials from the United States to respond to this attack,"the US department spokesman John Kirby said.