The victims with a reaction officer from Rusa.

A 93-year-old grandmother and her 70 year old daughter were robbed at knifepoint while in their home in Dawncrest, Verulam, on Thursday.

According to a statement by Reaction Unit South Africa (Rusa), the suspect entered the upper level of the property.

Rusa said the women heard noises prior to the incident but believed a troop of monkeys climbed onto the balcony.

The man instructed the 93-year-old to remain silent.