The explosion occurred late in the night, leaving the couple and three other – Mainul, 14, Sara, 3 and Mahfuza Begum, 30 injured, said Shyamal Dey, officer-in-charge (OC) of Rajapur police station.

Getting no response from them of till Saturday noon, Selim Hawladar, brother of Forkan, went into the house and found them wounded.

Later, they were taken to a local hospital where doctors declared the couple dead.