Russia's FSB security service said on Thursday it had detained a Belarusian man who had blown up two trains in Siberia on the orders of the Ukrainian intelligence services as part of a sabotage campaign against Russia's critical infrastructure.

A former Ukrainian lawmaker regarded by Kyiv as a traitor was shot dead near Moscow on Wednesday and a Ukrainian source said he was killed by the country's security service. Illia Kyva was a pro-Russian member of Ukraine's parliament before Moscow invaded in February 2022,

A source in Ukraine's defence sector told AFP that its SBU security services had orchestrated the assassination of the man who was kicked out of parliament and defected to Russia weeks after Moscow launched its military offensive last year.