The National Investigation Agency (NIA) on Monday carried out searches at seven places in the old city in connection with a 2016 case related to terror outfit ISIS, an agency spokesman said.
The spokesman said during the searches at the premises of suspects in Hyderabad, the agency seized digital devices and incriminating material.
He said further investigations were on in the case and refused to share any further details.
The NIA had registered a case in 2016 based on "credible information" that some youths of Hyderabad and their accomplices have entered into criminal conspiracy to wage war against the state by collecting weapons and explosive materials to target public places including religious sites, sensitive government building, etc. in various parts of the country.
The NIA had completed investigation in the case and filed a charge sheet against 11 people of whom three were absconding.
Agency officials said that some further leads were received in this case after which searches were conducted on Monday.