ACT Policing say the offender threw the woman to the ground, took her handbag and fled toward Ainslie about 10.55am, at the back of Allawah Flats.

The male offender is described as being Caucasian wearing sunglasses, a purple hoody, black cap, jeans and had a black bandana style mask covering his face.

Police are urging anyone who may have witnessed the attack, or has any information which may assist the investigation to contact Crime Stoppers on 1800 333 000, or via www.act.crimestoppers.com.au. Information can be provided anonymously.