Russia says it will soon take retaliatory measures against Britain for its decision to expel twenty three Russian diplomats over the poisoning of an ex-spy and his daughter.

In a statement, Russian Foreign Ministry called the Britain's decision as a sign of choosing confrontation with Moscow.

The Foreign Ministry termed British Prime Minister Theresa May's statement in the parliament on the issue as a blatant provocation. It said the statement undermines the foundation of dialogue between the two countries.

Meanwhile, the United States has supported Britain's decision to expel Russian diplomats.