Wives of former police chiefs Yakub Saygılı and Kazım Aksoy, who led corruption and bribery operations against the government back in 2013, were detained.

According to pro-government Yeni Şafak newspaper on Thursday, Esra Filiz Saygılı and Sümeyye Aksoy were taken into police custody over their alleged use of ByLock, a controversial, encrypted mobile app that the government believes to be the top communication tool among followers of the Gülen movement.

The movement stands accused of masterminding the July 15, 2016 coup attempt in Turkey while it denies involvement.

The government had also dismissed corruption allegations billing them as attempts to topple down its rule. Similar allegations have recently resurfaced in a separate investigation in the US with an Iranian-Turkish gold trader being accused of violating UN sanctions against Iran with the help of corrupt Turkish officials including former ministers.

More than 130,000 people have been detained since the summer of 2016 over Gülen ties, most of whom including Amnesty International’s Turkey director Taner Kılıç is accused of using ByLock.

Yakup Saygılı, former chief of the Istanbul police’s anti-fraud unit and Kazım Aksoy, Istanbul’s ex-deputy criminal police chief have already been under arrest for 3 years.