A horrifying murder investigation has rocked a quiet Australian community after a 4-year-old boy was found dead inside his home with severe injuries to his arm — and police began investigating the possibility of cannibalism.

The child’s 32-year-old mother walked into the Wyong Police Station, north of Sydney, on Saturday, prompting officers to conduct a welfare check at her nearby home, according to the Sydney Morning Herald.

When police entered the property, they discovered the body of the young boy in what authorities described as an “extremely confronting” scene.

The child had suffered significant injuries to his arm, and the discovery was reportedly so disturbing that police officers and emergency responders who attended the home were offered support services.

Investigators are now examining whether cannibalism may have been involved following “discussions” with the mother, the Sydney Morning Herald reported.

Nine News also reported that the boy may have been dead inside the home for several days before he was discovered.

“I’m prepared to say publicly at the moment, it was an extremely confronting scene,” Superintendent Chad Gillies of Tuggerah Lakes Police told reporters during a Sunday morning press conference.

“It’s been confirmed the child had injuries. I am not going to speculate further on what those injuries are,” he added.

The mother, who has not been publicly identified, was arrested at the police station and charged Sunday with murder and a domestic-violence-related offense.

Investigators also seized the woman’s vehicle and collected additional evidence as part of the ongoing investigation.

Gillies said even the most experienced first responders were deeply affected by what they encountered inside the home.

“This is a confronting scene for even the most experienced police and ambulance, and that’s why we need to support them,” he said.

The killing has stunned residents of Wyong, a normally quiet coastal town where neighbors said the young boy had always appeared happy and energetic.

One neighbor, who had previously worked on the mother’s car, recalled seeing the child walking the family dog and playing outside.

“[The boy] was all happy, seen him walking the dog and walking up and down the street. He was very energetic,” the neighbor said.

The man also remembered the boy joking with him while he repaired the vehicle.

“[The boy] goes, ‘Oh, you’re working on mom’s car, has she broken it again?’ He was happy. We couldn’t see signs of anything,” said the neighbor, who asked not to be named.

Another neighbor said the mother and son had moved into the rental property earlier this year following an alleged domestic-violence incident involving the woman and a former partner.

The mother was denied bail after she failed to appear in court on Sunday.

She is scheduled to return to court in Wyong on Sept. 1 as investigators continue working to determine exactly what happened inside the home.