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Husband of Russian mother of 7 suspected of treason called in for questioning

  • In this handout photo taken on Friday, Nov. 28, 2014 and released by Anatoly Gorlov, Svetlana Davydova's husband shows, Svetlana Davydova, third left, and her husband Anatoly Gorlov, right, posing for a photo together with their children at home in Russian town Vyazma. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested last month on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd.  (AP Photo/Family handout)

    In this handout photo taken on Friday, Nov. 28, 2014 and released by Anatoly Gorlov, Svetlana Davydova's husband shows, Svetlana Davydova, third left, and her husband Anatoly Gorlov, right, posing for a photo together with their children at home in Russian town Vyazma. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested last month on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd. (AP Photo/Family handout)  (The Associated Press)

  • An unidentified member of liberal Yabloko Party holds a placard in support of  Svetlana Davydova outside the FSB (Federal Security Service) headquarters in Moscow, Tuesday, Feb. 3, 2015. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested in January on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd. The poster reads: Freedom to Svetlana Davydova. (AP Photo Pavel Golovkin)

    An unidentified member of liberal Yabloko Party holds a placard in support of Svetlana Davydova outside the FSB (Federal Security Service) headquarters in Moscow, Tuesday, Feb. 3, 2015. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested in January on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd. The poster reads: Freedom to Svetlana Davydova. (AP Photo Pavel Golovkin)  (The Associated Press)

  • An unidentified member of liberal Yabloko Party holds a placard in support of  Svetlana Davydova outside the FSB (Federal Security Service) headquarters in Moscow, Tuesday, Feb. 3, 2015. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested in January on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd. The poster reads: Freedom to Svetlana Davydova. (AP Photo/Pavel Golovkin)

    An unidentified member of liberal Yabloko Party holds a placard in support of Svetlana Davydova outside the FSB (Federal Security Service) headquarters in Moscow, Tuesday, Feb. 3, 2015. Davydova, a mother of seven who lives in the city of Vyazma in western Russia, was arrested in January on treason charges for providing Ukraine with information on Russian troops movements. Rights defenders and opposition activists have rejected charges against her as unfounded and absurd. The poster reads: Freedom to Svetlana Davydova. (AP Photo/Pavel Golovkin)  (The Associated Press)

The husband of a Russian woman who is in custody on suspicion of espionage says he has been called for questioning.

Svetlana Davydova, a mother of seven who has been in custody since January, is suspected of treason, which carries a prison sentence of up to 20 years.

Davydova's husband, Anatoly Gorlov, says the charges relate to her call to the Ukrainian Embassy to report an overhead conversation on a bus about Russian troops in Ukraine.

Gorlov said on Tuesday he had been summoned for questioning in relation to his wife's case.

Despite the mounting evidence, Moscow denies any role in the bloody conflict in Ukraine that has killed more than 5,300 people.

Davydova's ordeal has caused outrage in Russia, with activists picketing offices of the KGB's successor on Tuesday.