Two members of a family with ties to West Bengal's ruling Trinamool Congress were killed when a bomb they were making exploded in Birbhum district, police said on Friday.
The incident happened on Thursday night or possibly just after midnight inside the house of Sheikh Jabir Hussain in Ahmedpur, some 180 km from Kolkata, a police officer said.
"Two people have died. Prima facie it appears a bomb was being made in the house when it exploded," said the officer.
The victims were identified as Sheikh Hafizul and Tariq Hussain, brothers of Sheikh Jabir Hussain, a Panchayat member from the Trinamool Congress.
Residents insisted that some bodies were removed before police reached the scene.