Intelligence agencies say deadly toxin in skin of Ecuador dart frogs found in Navalny’s body and highly likely resulted in his death

Alexei Navalny, the Russian opposition leader, was killed by dart frog poison administered by the Russian state two years ago, a multi-intelligence agency inquiry has found, according to a statement released by five countries, the UK, France, Germany, Sweden and the Netherlands.

The US was not one of the intelligence agencies making the claim.

Navalny died in a remote Arctic penal colony where he was serving a 19-year sentence. Samples from his body were secured before his burial and sent to the laboratories of two countries.

The UK, describing the poisoning as barbaric, said it would be reporting Russia to the Organisation for the Prohibition of Chemical Weapons, as a flagrant violation by Russia of the chemical weapons convention (CWC).