Russia convicted Whelan, who holds U.S., British, Canadian and Irish passports, of spying last June and sentenced him to 16 years in jail. He denied spying and said he was set up in a sting operation. Washington demanded his release.
Moscow said that Whelan had been caught red-handed with classified information in a Moscow hotel room where agents from the Federal Security Service detained him on Dec. 28, 2018.
Whelan's Russian lawyer, Vladimir Zherebenkov, said that talks on an exchange were now taking place between Russian and U.S. security services.