Sheikh Hakim alias Hasan Saheb of Lalgola area in Murshidabad district, who is under treatment in Burdwan Medical College and Hospital for injuries sustained in the blast, was formally arrested during the day, the police said.
Two women--Rajira Bibi alias Rumi, widow of the suspected terriost Shakil Ahmed who died in the blast, and Amina Bibi, Hasan Saheb's wife, were arrested on Sunday in connection with the blast at Khagragarh here in which involvement of terror outfits like LeT and HuJI is being suspected.
The CID is now on the lookout for two suspects - Kausar and Abdul Kalam Sheikh in connection with the case.
Kausar is suspected to have been a regular at the house in Khagragarh were the blast took place.
Abdul Kalam Sheikh is a resident of Mangalkote area of the district and the investigators are on his trail after they found seven calls made to him from a mobile phone immediately after the blast.
