The women – both aged 23 – are being held by police over a spate of hold-ups across the city’s southwest.
Police were told two people allegedly armed with an axe and knives had stolen money and cigarettes and fled the scene in a Mitsubishi Lancer.
Shortly afterwards at 12.15am police went to a service station on Nuwarra Road, near Newbridge Road, Moorebank, following reports two people allegedly threatened the employee with a knife and axe.
The pair fled the scene with cash and cigarettes before officers arrived.
In the third incident, police were called to a Camden Valley Way service station, near Gellibrand Drive, at Edmondson Park, about 1.15am, after a worker was allegedly threatened with a hammer, before two people fled the scene with cash.
Police found the Mitsubishi Lancer at Commissioners Drive, Denham Court. The two women were arrested about 1.30am.
During a search of the vehicle, police seized number plates – believed to be stolen – as well as knives, an axe, cash and cigarettes.
The women are expected to be charged.
No injuries were reported as a result of the alleged robberies.
Police inquiries continue.