The mystery of a foul odour coming from a trash bin in front of an apartment unit in Jalan Lintang Madrasah, Jelutong Park here, unfolded with the discovery of a dead infant which was infested with maggots today.

State CID chief SAC Mazlan Kesah said the dead infant was found by a resident who could not stand the stench since last Tuesday.

"The infant was placed in a plastic garbage bag and initial investigations revealed that the apartment unit was occupied by two men and two women, but the women occupants had left the house a few days ago," he told reporters here.

He said the infant's body was sent to the Penang Hospital Forensic Department at 9am today for a post mortem.

Mazlan said so far no arrest had been made ​​and the case was investigated under Section 318 of the Penal Code for concealing the birth and dumping the infant.