Britain said on Wednesday that investigators now knew more about a mystery substance that struck down a former Russian double agent and his daughter in an English city, in a case that threatens to further damage already strained ties with Moscow.
Sergei Skripal, once a colonel in Russia’s GRU military intelligence service, and his 33-year-old daughter, Yulia, were found slumped unconscious on a bench outside a shopping center in the southern English city of Salisbury on Sunday afternoon.
Both remain critically ill in intensive care.
British politicians and media have speculated that Russia may have been behind the suspected poisoning of a man it regards as a traitor. Moscow has strongly rejected any involvement.
“We do know more about the substance and the police will be making a further statement this afternoon in order to share some of that,” interior minister Amber Rudd said after chairing the government’s emergency response committee.
“We need to keep a cool head and make sure that we collect all the evidence we can and we need to make sure that we respond not to rumor,” Rudd said. “Then we will need to decide what action to take.”