( CNN) The investigative website that claimed to have uncovered the real identity of one of two Russian agents involved in the Novichok poisonings in the UK earlier this year has now named the second one.

According to the investigative site, “multiple sources familiar with Mishkin, both in St. Petersburg and in his native Loyga” identified Petrov as Mishkin. CNN has not independently substantiated Bellingcat's reporting.

The UK's Metropolitan Police Service said it would not comment on speculation regarding the true identities of the two men accused of poisoning Russian spy Sergei Skripal and his daughter with the nerve agent Novichok in the southern English city of Salisbury in March.

Official mocks gaffes by Russian agents