The EU has recalled its ambassador to Moscow after leaders agreed it was “highly likely” Russia was responsible for a nerve agent attack in the UK.
In a statement following an evening of talks in Brussels, the European Council of EU leaders agreed “there is no plausible alternative explanation”.
PM Theresa May had said the Salisbury poisoning was “part of a pattern of Russian aggression against Europe”.
Moscow denies responsibility for the attack on an ex-spy and his daughter.
The EU said its ambassador to Russia was recalled “for consultations”.
Former Russian spy Sergei Skripal and his daughter Yulia remain in a critical but stable condition after the attack on 4 March.
The European Council statement added: “We stand in unqualified solidarity with the United Kingdom in the face of this grave challenge to our shared security.”