A third suspect linked to the Salisbury poisoning has been named by an investigative website as Denis Sergeev, a high-ranking Russian military intelligence officer.
The website Bellingcat said Mr Sergeev, 45, as a senior member of Russia’s GRU agency who used the alias of Sergey Fedotov.
The identity of two other agents suspected of the Salisbury attack where also named by the website as Colonel Alexander Mishkin and Colonel Anatoliy Chepiga.
The two suspects in the attempted poisoning of ex-Russian spy Sergei Skripal were originally named as Alexander Petrov and Ruslan Boshirov - although it was made clear that the names were aliases.
Both men deny any involvement in the novichok attack, claiming that they were in Salisbury on holiday to see the Salisbury cathedral.
The two suspects speaking on Russia Today claiming they were tourists. Image: Russia Today.
British authorities have not confirmed the existence of a third suspect.
Mr Sergeev was reportedly trained at Russia's Military Diplomatic Academy, which trains elite military intelligence officers, and attended some time between 2000 and 2002.
Flight information, assessed by Bellingcat and its investigative partners, suggests that Mr Fedotov was in Britain on the day Skripal and his daughter Yulia collapsed after being exposed to the chemical agent novichok.
They added that Mr Fedotov left that day, March 4, via a flight from Rome instead of returning on a flight that he was booked on with the other two suspects from London.