Russia has expressed interest in swapping a scientist jailed for espionage with one of 10 alleged Russian agents detained by US authorities last month, a lawyer for the scientist has said.
Igor Sutyagin, a nuclear weapons expert, was convicted by a Russian court in 2004 on charges of passing classified military information to a British firm, which prosecutors said was a front for the US Central Intelligence Agency (CIA).
Neave Barker reports from Moscow.
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