The residents of affluent south Brisbane suburb Parkinson are in shock following the horrific fatal stabbing of a baby girl yesterday. “We didn’t meet most of our neighbours until today,” Watheroo Place residents Natasha and Peter Walsh told the Brisbane Times.

Police were called to the house at 2.30pm on Wednesday, after screams and commotion were heard on the street. Attending officers made the grim discovery of a blood soaked driveway, and a two-month old girl, as well as her mother and grandparents, with critical stab wounds. The infant was taken to Lady Cilento Children’s Hospital, but later died.

A witness video shows that the blood soaked grandfather of the baby was immediately arrested on the street following the crime. Channel 9 has reported that the 53-year old allegedly stabbed both his wife and daughter in pursuit of the infant, and later also injured himself.

He now remains under police guard in intensive care, reports the ABC, where detectives will later question him. He and his wife both underwent operations at Prince Alfred Hospital.

The 28-year-old mother, who ran from the garage to a neighbours’ for help, also remains in hospital with critical injuries. It is believed that the two grandparents were visiting their daughter and her newborn child from China.

Inspector Sean McKay explained that no one else was believed to be involved in the dispute. “Suffice to say, we’re not looking for anyone else at the moment,” he told Channel 9.

Police and forensic detectives have visited the Watheroo Place household, and with the motive for the attack still unknown, the site remained a crime scene on Thursday. The park across the road from the Parkinson home will later host a candlelight vigil for the attack.

Anyone with further knowledge about this attack should contact Crime Stoppers 1800 333 000

Readers who find this information distressing can find support on Lifeline 13 11 14.