A four-year-old boy with disabilities who was the subject of an amber alert when his parents took him from a Brisbane hospital has been taken by police after they stormed a NSW property and confronted his family.

Police issued an amber alert in late April, after the young boy left with his parents from Lady Cilento Children's Hospital in Brisbane.

They were later found in New South Wales, and the boy was taken to John Hunter Hospital in Newcastle.

He was returned to his parents care and no charges were laid.

Last night authorities attended a property in Newcastle "regarding a child at risk" and took the boy into their care.

"After extensive negotiations a four-year-old child was taken to John Hunter Hospital for medical assessment," NSW Police told 9news.com.au in a statement.

Dramatic videos posted online captured the confrontation between authorities and the boy's parents as he was taken away.

"I understand you're upset, but we can't leave here without the child,” an officer can be heard saying.

"We have a court order for his removal," another officer said.

"You have no warrant to do this," one person can be heard saying.

A woman, who appeared to be the one filming the incident, is heard claiming the boy’s parents have "so much evidence against them people of malpractice and negligence".

It's not clear who she is referring to.

"They were told to go home…prepare your son’s funeral," she added as she broke into sobs.

"So they took him off synthetic food and medicine and then they fed him organic food and he’s getting healthier and stronger every day."

The couple believe Ubuntu, a church and wellness centre in Newcastle, is the best place for their son to receive treatment.

They claim they have been treating their son with medicinal marijuana instead of traditional medicine, and have not vaccinated him since he was two years old.

The boy's mother said they stopped vaccinating because the drugs gave him seizures.

The parents have been issued a Court Protection Order and will front court this week.

© Nine Digital Pty Ltd 2017

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