(From BBC News)
Russian ambassadors have been summoned to several European foreign ministries amid reports of imminent diplomatic expulsions, reports say.
EU leaders agreed last week it was highly likely Russia was behind the poisoning of a Russian ex-spy and his daughter in the UK.
The bloc recalled its envoy to Moscow.
On Monday, Latvia, Lithuania, Estonia and Poland summoned Russian ambassadors to their foreign ministries, officials were reported as saying.
No official reason has so far been given for the diplomatic action but a number of countries across the EU had been expected to expel Russian diplomats this week over the poisoning of former Russian spy Sergei Skripal and his daughter Yulia on 4 March in Salisbury, southern England.