The 20-year-old victim, who was not identified by officials, received three fatal bullets to the side of her head, reportedly by her brother, at her in-law's house in western Amman Wednesday night.

The suspect immediately headed to the nearest police station and turned himself in, handing over the gun he used to shoot his sibling to officers on duty.

"The suspect told police he had just killed his sister to cleanse his family's honour," the sources said.

The victim became the fifth person reportedly murdered in a so- called honour crime since the beginning of the year, the paper said.

Last year, a total of 18 people were killed for reasons of "honour" in Jordan, according to official sources.