The National Investigating Agency (NIA) on Wednesday carried out searches at various places in Coimbatore in Tamil Nadufollowing reports that some people werein touch with those involved in the Easter day church blasts in Sri Lanka.
Raids were conducted by a team of NIA sleuths at seven places in the city, police sources said.
The searches were a continuation of those conducted in Kerala in connection with an ISIS terror module, sources added.
However, details about seizure of documents or devices were not available immediately, they added.
The IS had claimed responsibility for the serial bombings in Sri Lanka in which over 250 people were killed.
The Sri Lankan government has said that local terror group National Towheeth Jamaat (NTJ) carried out the attacks with support from the IS.
Soon after the April 21 attack in Sri Lanka,India had stepped up security in the southern states.