KUALA LUMPUR (THE STAR/ASIA NEWS NETWORK) - The father of a missing boy called his son's killer heartless and inhumane, after the decomposed body of Noor Amila Edrus Norsham, five, was found in a ravine.

Mr Norsham Jalil, 63, had lodged a report after the boy failed to return to their Perumahan Awam Jinjang Utara home.

Noor Amila was last seen near a mosque at the Jinjang Utara longhouse, close to his home, at about 7.20pm on Aug 11.

His body was discovered at 2pm on Thursday (Aug 18), about a week after he went missing, when the main suspect in the case led the police to a ravine in Kampung Kemensah, Hulu Kelang.

The case had been reclassified as a kidnapping after the suspect - Noor Amila's stepbrother-in-law, 25 - was arrested on Monday (Aug 15) to facilitate investigations.

Mr Norsham said he was informed of the gruesome discovery of his son's body by his friends while he was in Sepang on Thursday afternoon.

"I pray to god that whoever the killer is, he or she will get what the person deserves. What the assailant did was heartless.

"We really feel the loss. My son was such a nice boy, he was good at reciting the Quran, diligent at performing prayers and had been consistently going to the mosque since he was four.

"Usually, the mother or older brother would accompany him but I guess it was fated," Mr Norsham said at the mortuary on Thursday night.

After receiving the news, he rushed straight to the Kuala Lumpur Hospital mortuary.

"I did not get to see my son but he was identified based on what he was found wearing. We were told by the doctor that his body was severely decomposed," he said.

It was believed that the body of Noor Amila, the eighth of nine siblings, was mutilated before he was dumped into the ravine.

He was buried at the Batu 5 Sungai Emas Muslim cemetery on Thursday night.