The National Investigation Agency officials conducted a pre-dawn raid on Thursday in five places in Coimbatore and seized computers, mobile phones and Arab literature.
The searches, conducted in al Ameen and other places in the predominantly Muslim Ukkadam area of the city, began at 5 am and ended around noon.
The officials, who were assisted by the local police seized laptops and mobiles and Arab literature to find out if the suspects were supporting the IS and who were their contacts.
The raids followed a State-wide alert, specifically in Coimbatore, a few days following a tipoff by Central intelligence agencies that six Lashkar E Toiba terrorists—five Tamil speaking Muslims Sri Lankans and a Pakistani national—had entered the State by sea route.
During the security blanket, the police arrested three local youths in Coimbatore but let them off after failing to get any evidence to link them with any terrorist outfit. On July 14, similar raids were conducted by the NIA in the predominantly Muslim area of Mannadi and in Purasawalkam as well in Nagapattinam. It then said it had busted a radical outfit, Ansurallah, whose aim was to establish Islamic rule in India.
The NIA officials questioned three suspects-- Syed Mohammed Bukhari and Hassan Yunusmaricar in Chennai and M Y Harish Mohammed in Nagapattinam.
The NIA also recovered nine mobiles, 15 SIM cards, seven memory cards, three laptops and five hard disks besides six pen drives, two tablets and three CVDs and CDs. They also recovered documents and magazines, notices, banners and books.
Bukhari was questioned in Chennai in the State headquarters of Wahdat-e-Islami Hind .Bukhari, however denied any terrorist link and said his was a charitable organisation working among the poor in the community. No progress has been made in the case so far.