A man allegedly killed his six-month-old daughter and stabbed wife and two other daughters at Purbo Joydharbhanga village in Panchagarh Sadar upazila yesterday.
The deceased was Ratna, daughter of accused Nazmul Islam of the village.
Local union parishad member Aynul Haque said neighbours found Nazmul's wife Rashida Begum, 30, and daughters Nazira Begum, 10, Ria Moni, 5, and Ratna in a pool of blood at the open space in front of the house in the morning.
They were brought to Panchagarh Sadar Hospital where on-duty doctor declared Ratna dead.
The three others were later referred to Rangpur Medical College Hospital.
Nazmul, 40, son of Joynul Haque of the same village, often tortured his wife Rashida over trivial matters, said Rashida's father Rashidul Islam.
Following a family feud yesterday morning, Nazmul stabbed Rashida, Nazira and Ria Moni indiscriminately, threw Ratna to the ground and fled, said Rashidul.
Police started raids to arrest Nazmul, said Additional Superintendent of Police Naimul Hasan.