(Reuters) -French researcher Laurent Vinatier, already jailed in Russia on charges of violating the country's "foreign agent" laws, now faces a new espionage charge, according to court documents cited by Russian news agencies.

Vinatier was jailed for three years last October for failing to comply with laws requiring individuals deemed "foreign agents" to register and meet a number of stipulations. His appeal against the sentence was thrown out in February.

The FSB security service had accused Vinatier of failing to register as a foreign agent in Russia while collecting military information of value to foreign intelligence services.

Russian news agencies quoted documents from Moscow's Lefortovo Court as saying he would now be charged under espionage laws, without providing further detail

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