Turkish prosecutors, on Tuesday, issued detention warrants for 47 people working at Turkey’s education and energy ministries over alleged links to the Gülen group, which is accused by the Turkish government of masterminding a failed coup attempt on July 15.

Thirty of the individuals work for the Education Ministry, while 17 work at the Transportation Ministry, according to Turkish media reports.

All 47 are reportedly users of a smart phone application known as ByLock, which Turkish authorities consider to be the top communication tool among followers of the Gülen group.

Tens of thousands of civil servants, police officers and businessmen have either been dismissed or arrested for using ByLock since the failed coup attempt.

The military coup attempt killed over 240 people and wounded more than a thousand others. Immediately after the putsch, the Justice and Development Party (AK Party) government along with President Recep Tayyip Erdoğan pinned the blame on the Gülen group.

The group denies any involvement.

According to a statement from Turkish Justice Minister Bekir Bozdağ on May 6, 149,833 people have been investigated and 48,636 have been jailed as part of an investigation targeting the Gülen movement since the July 15 coup attempt in Turkey.