Seventeen people were detained in a probe into Esenyurt Municipality and 11 in a probe into Cesme Municipality. Those detained in Esenyurt include deputy mayors Yusuf Ulutaş and Ümit Ünal.
The Istanbul Chief Public Prosecutor's Office is investigating claims of irregularities in some Esenyurt tenders and bribes taken from contractors. The Cesme probe is examining a tip that municipal documents were sought to be destroyed on 5 October.