A 10-year-old boy who had his penis severed during a botched circumcision had his genital reattached by doctors at the Kuala Lumpur general hospital (HKL).

The surgery was conducted successfully on Dec 20, the same night of the harrowing accident, the New Straits Times reported.

"HKL doctors performed (the operation) soon after (the boy) was brought to the hospital.

"The operation was successful and the boy is recovering at HKL's surgical ward," a HKL spokesperson is quoted as saying.

The boy lost part of his genitals in the laser technique circumcision at about 8.15pm that night, at a clinic in Taman Cheras Utama.

The boy was first rushed to Hospital Universiti Kebangsaan Malaysia and transferred to HKL to undergo surgery to reattach the glans, the daily reported.

Police are investigating the incident under the Penal Code for grievous harm due to negligence, after the boy's father lodged a police report.