Three US citizens imprisoned in Russia, including Wall Street Journal reporter Evan Gershkovich, are expected to be released on Thursday, under a prisoner exchange deal.

Gershkovich, US Marine veteran Paul Whelan, and Russian-American radio journalist Alsu Kurmasheva will be released under the deal agreed by the Biden administration, a senior US official confirmed.

Others are believed to be part of the deal. The exchange has not occurred yet but is expected later today.

There has been speculation for days of a major swap between various countries which was heightened after several dissidents and journalists jailed in Russia were moved from their prison cells to unknown locations.

Vladimir Kara-Murza, a Kremlin opponent with dual Russian-British citizenship, is one of those detainees whose whereabouts are unknown which has fuelled expectations that he too could released.

Others potentially on the list are Russian opposition politician Ilya Yashin and veteran human rights campaigner Oleg Orlov.

Although secret prison transfers are common in Russia, the multiple “disappearance” of well-known prisoners was unusual.

Earlier this week, Belarusian leader Alexander Lukashenko pardoned a German citizen Rico Krieger who had been sentenced to death for terrorism and other charges.

In Germany, Vadim Krasikov – identified by German officials as a colonel in Russia’s FSB intelligence service – is serving a life sentence for the 2019 murder of a Kremlin opponent in a Berlin park.

He may be among the prisoners Russia gets in return. If all the exchanges take place it will be one of the biggest exchanges between Russia and the West in history.