A 28-year-old man died after being hit with a stick allegedly by his elder brother in the Khanjahan Ali area of Khulna city in the early hours of Thursday.
The deceased was identified as Parvez Sheikh, a resident of Khulna city.
Kamal Hossain, officer-in-charge of Khanjahan Ali police station, said Parvez was physically torturing his wife around 12.30am in the family house in the Khanjahan Ali area.
Rubel Sheikh, the deceased's elder brother, hit Parvez with the bamboo stick to save his sister-in-law from the torture, leaving him dead on the spot, said the OC.
The body has been kept in Fultola Health Complex. No arrest has been made so far, he added.