
The deceased were identified as Golap Hossain, 40, and his six-year-old daughter, Tawba, residents of the upazila.
Alauddin Mia, Officer-in-Charge of Sirajdikhan Police Station, said a group of miscreants intercepted Golap and his daughter on Wednesday night while they were returning home after meeting a brick kiln worker.
At one stage, the miscreants stabbed Golap and his daughter indiscriminately, leaving Tawba dead on the spot and Golap injured.
Golap was later taken to a hospital in Keraniganj, where he succumbed to his injuries on Thursday afternoon.
Police suspected that the miscreants might have carried out the attack over a land dispute, reports UNB.
Police also arrested a man and efforts were underway to arrest others involved in the killings, the OC said.