“We hope to get the results within the next two to three days. The forensic results will provide more lead on those involved,” he told reporters.

Hussein said that it was difficult to make any arrest at the moment, as only a limited number of statements had been taken in the course of the investigation.

Police had to go door-to-door in the Idaman residential area, which comprises 18 blocks of flats and 2,400 homes.

The body of Zayn, 6, an autistic boy, was found by a stream near the Idaman flats in Damansara Damai on Wednesday, a day after he was reported missing.

“This isn’t a straightforward case. But I can guarantee that we will do our best to track them (the murderers) and bring them to justice,” Hussein said.

Hussein also said that Zayn had not been abused, contrary to claims made by some quarters.

“There were no scars on his body. His parents had taken good care of him.

“So speculation that he had been abused is unfounded,” he said, adding that people should refrain from making baseless claims which could jeopardise the investigation.

Last night, Bukit Aman CID director Shuhaily Zain revealed that Zayn may have been killed somewhere else before his body was dumped near a stream just 200 metres from his home.

The case was reclassified as murder after a post-mortem revealed injuries to the boy’s neck and body. Shuhaily said the cause of death could be strangulation. There were also defensive wounds.

Hussein urged the public to refrain from issuing any statements that could jeopardise the case or hurt the feelings of the family. “The entire nation is following the case. Don’t do anything that would obscure it and give us the space to investigate the case,” he said.