West Bengal Home Secretary Basudeb Banerjee told PTI, "All the accused in the blast have been slapped with cases under the UAPA in addition to cases which were lodged under IPC intially."
The CID has, meanwhile, intensified its search for the two suspects Kausar and Abul Kalam who are still at large.
Four persons, including two women, have so far been arrested in connection with the grenade explosion at Khagragarh in Burdwan district which left two suspected terrorists dead.
IPC sections 121A (conspiracy to wage war, or attempting to wage war, or abetting waging of war, against the Government of India), 122 (collecting arms etc with intention of waging war against the Government of India) and 123 (concealing with intent to facilitate design to wage war) had been slapped against the four initially.
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Meanwhile, two more houses used by a blast suspect have been identified situated at a walking distance of the Khagragarh house where the explosion took place.
The CID seized four 9 mm loaded pistols, two magazines, 68 rounds of cartridges and a lot of documents from one of the houses at Baburbagh.
In the other house on Badshahi Road only documents were found. The CID is on the lookout for Kausar and Abul Kalam, two prime suspects in the case.
Rajira and Amina were brought to the CID headquaters in Kolkata today and were interrogated by the CID officials.
Hakim who is under treatment at Burdwan Medical College and Hospital was arrested yesterday. Hafez Mollah alias Hasan is another accused who was arrested on October 5.