"A preventive measure for two months," - said the defender.
According to him, Sophia feels fine, her relatives turned to the consulate to prepare documents at their request.
"The place of detention is the KGB pre-trial detention center," the lawyer added.
Earlier, Sophia Sapega's father told RT that his daughter was never interested in politics.
Sapega is suspected of committing crimes in the period from August to September 2020, provided for by several articles of the Criminal Code of Belarus.
Russian citizen Sophia Sapega was detained in Minsk on May 23.
She flew in a Ryanair plane together with the founder of the extremist Telegram channel NEXTA in Belarus, Roman Protasevich.
The Ryanair plane, en route from Athens to Vilnius, on May 23 urgently landed in Minsk due to the report of a bomb on board.
Information about mining was not confirmed.
Russian Foreign Ministry spokeswoman Maria Zakharova also said that, apart from Sophia Sapega, none of the Russian citizens left the Ryanair flight in Minsk.