FILE - A view of the pre-trial detention center Lefortovo, where former U.S. Marine Paul Whelan is reportedly held in custody, in Moscow, Jan. 3, 2019.
FILE - A view of the pre-trial detention center Lefortovo, where former U.S. Marine Paul Whelan is reportedly held in custody, in Moscow, Jan. 3, 2019.

The brother of a former U.S. Marine with multiple citizenships says Irish government representatives have visited Paul Whelan at the Russian prison where he is being held on an espionage charge.

Paul Whelan, a U.S. citizen detained in Russia for
FILE - Paul Whelan, a U.S. citizen detained in Russia for suspected spying, appears in a photo provided by the Whelan family on Jan. 1, 2019.

David Whelan said in a Wednesday statement that according to diplomatic staff members from Ireland, conditions were good in the Moscow prison where his brother was detained. The statement said U.S. officials were expected to visit Thursday; the U.S. ambassador saw him on Jan. 2.  

Whelan was detained Dec. 28 and charged with spying, which carries a potential sentence of 20 years upon conviction. Russian officials have not released details of the allegations against him.

Whelan, who was living in Michigan and working as global security director for a U.S. company, also holds British and Canadian citizenships.