The Guardian newspaper provided in its Sunday report new details concerning the incident, citing unnamed sources. It said, apart from other things, that the prosecution believed that Russian nationals Alexander Petrov and Ruslan Boshirov, suspected by London of poisoning the Skripals, had a "backup team."
"Following the recent publication by The Guardian, the embassy files a new note to the UK Foreign Office requesting it to confirm or refute the information that this publication contains," the press secretary said.
A representative of the Scotland Yard refused earlier in the day to provide Sputnik with a comment on the publication, adding that investigation continued in several directions.
On March 4, 2018, the Skripals were found unconscious on a bench near a shopping center in Salisbury. London claimed they were poisoned with a military-grade nerve agent and accused Moscow of staging the attack. Moscow has refuted all accusations.