Russia warned on Thursday that it would retaliate very soon for Britain’s expulsion of 23 diplomats over a nerve toxin attack on a Russian former double agent.

AVA- Britain says Russia is responsible for using the Novichok nerve agent against Sergei Skripal and his daughter Yulia in the English city of Salisbury. They have been critically ill in hospital since they were found on March 4.
Russia denies any involvement and Foreign Minister Sergei Lavrov accused London of behaving in a “boorish” way, adding that this was partly due to the problems Britain faces over its planned exit from the European Union next year.
Lavrov said Russia’s response would come “very soon” but be conveyed to British officials first, an apparent contradiction of an earlier report by state news agency RIA that said Lavrov had promised to expel British diplomats.
In the biggest expulsion of Russian diplomats from London since the Cold War, Prime Minister Theresa May on Wednesday gave 23 Russians who she said were spies working under diplomatic cover a week to leave London.