Journalists who have worked in Moscow call for release of Evan Gershkovich

More than 300 journalists write to Russia that arrest sends dangerous signal' about attitude to journalism

More than 300 foreign correspondents who have worked in Moscow have written to the Russian government to call for the immediate release of Evan Gershkovich, the Wall Street Journal reporter being held on espionage charges, saying his arrest sends a disturbing and dangerous signal" about the country's attitude to independent media.

Gershkovich, who was detained in the Urals city of Yekaterinburg last month on spying charges that carry a possible 20-year prison sentence, is the first US journalist detained on such charges since the end of the cold war. Both the Wall Street Journal and the US government has denied that he was involved in espionage.