(CNN) A British-Iranian dual citizen has been accused of working with organizations allegedly attempting to overthrow the Iranian government, according to a statement from that country's Islamic Revolutionary Guard Corps.
Iran: UK-Iranian attempted to overthrow government
Nazanin Zaghari-Ratcliffe was arrested on April 3. She is being held in Kerman prison in southeast Iran.
The Iranian government accuses her of working for a UK media network allegedly involved in activities against the Islamic republic, the IRGC said in a statement Wednesday.
"By being a member of foreign companies and institutions, she has been participating in their scheme and implementation of their media and cyber projects for their soft overthrow of the sacred system of Islamic Republic," the IRGC said.
"She headed one of the main obstinate networks that have continued their criminal activities during the past few years, under the guidance and support of media and foreign government spy services. "
Zaghari-Ratcliffe -- a project coordinator with the Thomson Reuters Foundation, a charitable arm of the international news outlet Thomson Reuters, which supports independent journalism -- has been unable to visit her daughter or access a lawyer since being taken to prison, her husband Richard Ratcliffe said.
The Thomson Reuters Foundation said Zaghari-Ratcliffe had worked with the organization for the last four years, adding that she had no professional dealings with Iran. Ratcliffe said his wife trains journalists in developing countries such as Morocco and Burma, though she's never worked in Iran for the Reuters foundation.
"I've heard people speculate that the arrest may have something to do with her charity work," he said.
Ratcliffe has launched a petition calling on British Prime Minister David Cameron and Iran's Supreme Leader Ali Khamenei to help free his wife.
Zaghari-Ratcliffe moved to Britain in 2007, and has visited her family in Iran four times since having baby Gabriella almost two years ago, Ratcliffe said.
His wife and the couple's 22-month-old daughter Gabriella had been on holiday visiting family in Iran and were due to fly home to Britain on April 3. But they never made the flight.