London (CNN) UK investigative website Bellingcat claims to have identified one of the men accused of poisoning former Russian spy Sergei Skripal as a highly decorated officer in the Russian military.

Moscow denies the report, describing the allegation as "bogus."

Bellingcat reported Wednesday that the man identified by the British as "Ruslan Boshirov," one of two men suspected of poisoning Skripal and his daughter in the UK in March, is GRU Col. Anatoliy Vladimirovich Chepiga, whose name was found on a list of people receiving the Hero of the Russian Federation award in December 2014, according to Bellingcat.

British authorities said that "Boshirov" was an alias when they named him and "Alexander Petrov" as the suspects in the attempted killing. Prime Minister Theresa May also maintains she believes the men were traveling under aliases.

Bellingcat says the identification is based on its own investigation, and was confirmed by "multiple sources familiar with the person and/or the investigation."

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