A two-month-old baby girl was found stabbed to death in a suburb south of Brisbane, Australia, Courier Mail reports. Qianqian "Queenie" Xu was allegedly stabbed by her grandfather at the family’s home in Parkinson about 2.30pm yesterday, January 6.

The child was found in critical state by the police authorities. Passersby and neighbours reported hearing horrific screams coming from inside the house. The police officials who responded to calls from neighbours rushed inside and took the critically injured infant to hospital but the baby could not be saved. She succumbed to injuries.

Her grandmother and mother, Yuanyuan Cao, 28, originally from Luoyang in China, were also stabbed. Ms Yuanyuan’s partner George was working at the time of the attack.

Detective Inspector Tony Duncan told a media conference investigators were still searching for answers as to why the tragedy unfolded.

Duncan said the baby’s father was at work when police believe the grandfather started stabbing the trio. The father, a small-business owner, did not know his child was dead until detectives told him. He is being comforted by family.

Duncan also added that there were no recent incidents at the home to point to such a horrific turn of events.