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Two Russian men suspected of carrying out the Salisbury poisoning of Sergei Skripal in 2018 are being linked to an explosion at an arms depot in the Czech Republic four years earlier.
Czech police issued photos of Alexander Petrov and Ruslan Boshirov, who they say were in the country at the time of the blast, which killed two people.
The Czech Republic has expelled 18 Russian diplomats in retaliation.
A senior Russian parliamentarian on Saturday called the claim
This post was originally posted on BBC News. Read the rest of the story at https://www.bbc.co.uk/news/uk-56790053.