The suspects rammed into the vehicle carrying cash between Apex and Main Reef Road.
Ten suspects bombed a cash-in-transit van in Benoni and made off with an undisclosed amount of money on Monday morning.
They used explosives to forcefully open safe and took an undisclosed, but large amount of money.
Provincial spokesperson, Colonel Lungelo Dlamini said suspects were in a BMW and a Mercedes, which they used to flee the scene.
Dlamini said that no-one was hurt and that police were still on the scene.No-one has been arrested as yet and there are no suspects.
Police have appealed to anyone with information to come forward or to contact Crime Stop on 08600 10111.