Russia says it has allowed US consular access to American citizen Paul Whelan who was arrested in Moscow on Friday on suspicion of spying.
Russia’s foreign ministry said consular officials were allowed to see Mr Whelan on Wednesday afternoon. There has been no word from the US state department.
Earlier, US Secretary of State Mike Pompeo said they wanted to know more about the charges facing Mr Whelan.
“If the detention is not appropriate, we will demand his immediate return.”
Russia says Mr Whelan was “caught spying” in Moscow but his family says he was in Russia to attend a wedding and is innocent.
Spy scandals have erupted between Russia and America at regular intervals since the Cold War, while Russia’s actions in Ukraine since 2014, and allegations of Russian meddling in the 2016 US presidential election, have seen relations plummet.
Who is Paul Whelan?
Mr Whelan is a 48-year-old former Marine who is now director of global security for Michigan-based automotive components supplier BorgWarner.
His twin brother David Whelan told BBC News that Paul had arrived in Russia on 22 December and had been due to return on 6 January.
He had been attending the wedding of a fellow former Marine to a Russian citizen and had planned to visit Russia’s second city, St Petersburg, in addition to Moscow.
Paul Whelan, his brother said, has been visiting Russia for business and pleasure since 2007.
David said Paul would stand out in a crowd as he is “about six foot [1.8 metres] and kind of hefty with a former soldier’s build”. But asked if he could think of any reason why he had attracted the attention of Russian security services, David Whelan was adamant there was none.
“I can’t imagine how someone with a law enforcement background who is also a former US Marine, and who is now working in corporate security and is also aware of the risks of travel, would have broken any law let alone the law related to espionage,” he said.
“His innocence is undoubted and we trust that his rights will be respected,” the family said in its statement.