A man allegedly hacked his sister-in-law and her infant son to death following a family dispute in Daulatpur upazila of Manikganj district in an attack, which also left the victim's husband injured.

The incident took place at Fakirpara village under Bachamara union on Saturday night.

The deceased were identified as Amena Begum, 28, wife of Abdus Salam, 40, and their one-and-a-half-year-old son Aswad.

Salam was critically injured in the attack and was admitted to Daulatpur Upazila Health Complex for treatment.

According to police and locals, a long-standing dispute over family matters and land ownership had existed between Abdus Salam and his younger brother Yusuf Ali, 35.

Around 10:00pm on Saturday, Yusuf allegedly became involved in an argument with his elder brother and sister-in-law regarding family issues.

At one stage, he allegedly attacked Amena and the couple’s young son with a sharp weapon, leaving them dead on the spot.

When Salam attempted to intervene, he was also attacked and seriously wounded.

Local residents rescued him and rushed him to hospital. Following the incident, the suspect fled the scene.

Officer-in-Charge of Daulatpur Police Station Swapan Kumar Sarkar said preliminary findings suggest that the killings took place following a family dispute.

He said they recovered the bodies and sent those to Manikganj Medical College Hospital morgue for autopsy. “Efforts are underway to arrest the accused," he said.