Northern Territory Police are calling for information after an 83-year-old woman was threatened with a knife and robbed in Alice Springs yesterday afternoon.

About 2.40pm NT Police received reports that the woman had been robbed by an unknown man on Telegraph Terrace.

The victim was approached near her driveway by the offender who then allegedly produced a knife and demanded her handbag.

When the victim refused, she fell to the ground, and the offender cut the straps from the handbag before fleeing the scene with it.

The woman was not physically injured during the incident.

General Duties members and Strike Force Viper attended and conducted patrols of the area, but the offender could not be located.

Investigations remain ongoing and police are urging anyone who witnessed the incident, or who may have CCTV, dashcam footage or information that could assist investigators, to contact police on 131 444 and quote reference number P26160577.

Anonymous reports can be made through Crime Stoppers on 1800 333 000.