The Maharashtra Anti-Terrorism Squad (ATS) on Tuesday conducted fresh searches at various locations in Thane and Aurangabad.
The ATS team reportedly detained at least nine people for questioning over their reported links with ISIS-inspired terror modules.
According to news agency PTI, the agency carried out an operation in both the districts following specific tip-off.
"They were on the ATS radar for a few days for their activities. Questioning is underway," an official said.
The official, however, refused to divulge more details on the operation.
(With PTI inputs)