Igor Sutyagin, a nuclear weapons expert, was convicted by a Russian court to 15 years in jail in 2004 on charges of passing classified military information to a British firm prosecutors said acted as a front for the US Central Intelligence Agency.
“They want to exchange Sutyagin for those accused of spying in the United States,” Anna Stavitskaya, a lawyer acting for Sutyagin, said by telephone. “They want the swap to take place tomorrow [Thursday].”
She said she did not know for whom he would be exchanged. Stavitskaya said Sutyagin would be sent initially to Britain.