Income Tax (IT) officials on Thursday ended their raid at the house of Tamil Nadu Chief Secretary P.Rama Mohana Rao.
The raids began on Wednesday morning and continued all night.
On Wednesday, searches were also conducted in Rao’s office in the state secretariat and in several other places connected to Rao, his son and others.
According to IT officials, raids were held in 12 locations.
A senior official in the IT Department said cash in new currency was seized from the raided premises.