Ann Simmons had been very vocal in her support of Evan Gershkovich, 31, who was working in in Yekaterinburg investigating the Wagner mercenary group when he was arrested.
It is the most serious move against a foreign reporter since Russia invaded Ukraine. Gershkovich is also the most notable American arrested by Russia since basketball star Brittney Griner.
Russian security services have accused US reporter Evan Gershkovich of spying on its military. They have provided no evidence. A brief arraignment hearing was held with the case classed as "top secret," his lawyer said.
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