Miscreants have slit the throats of four members of the same family at Kalaroa in Satkhira. Police found four bodies in a house.
The murder took place in Khalsi village of Helatala union at Kalaroa in Satkhira on Thursday early hour.
The deceased were- Shahinur Rahman, 40, his wife Sabina Khatun, 30, son Mahi, 9, and daughter Taslima, 6.
Additional Superintendent of Police said that Shahinur's elder brother Raihanul Islam heard the sound of humming in the early hour.
Later he got up and saw the door of Shahinur's house locked from outside. There are bloody bodies inside, he added.
Kalaroa Police Station OC Haran Pal confirmed the matter to media.
However, the cause of the murder is not yet known.