Two people were murdered in Jessore and Jamalpur.
An elderly man was killed allegedly by his drug addict son at Mathuapara village in Jessore's Jhikargachha upazila on Wednesday night.
The deceased was Babar Ali, 70, of the village.
Police arrested accused Anwarul Islam, 35, said Abu Saleh Mohammad Masud Karim, officer-in-charge of Jhikargachha Police Station.
Anwarul hacked his father when the latter refused to give him money for drugs. Seriously injured Babar later died on way to Jessore General Hospital, said the OC.
Meanwhile, the throat-slit body of a woman was found inside her house at Chakhar Char village in Jamalpur's Dewanganj upazila early yesterday.
The alleged killer husband Abdus Salam went into hiding soon after the incident.
Deceased Halima Khatun, 33, was mother of two children, said Dewanganj Police Station OC AKM Aminul Haque.
Our correspondents from Jessore and Jamalpur contributed to the report.