EWN reported on Tuesday that about R1.7 million was stolen from the branch in Parktown.
The robbery was confirmed by Hawks spokesman Captain Ndivuho Mulamu.
Safety deposit boxes containing valuables were stolen during a heist last month at an FNB branch in Randburg. TMG Digital reported earlier that police had found 252 of the 360 safety deposit boxes which were stolen a week before Christmas.
The boxes‚ which had been forced open‚ were found on a mine dump near the FNB Stadium in Soweto. There was no sign of jewellery or Kruger Rands which the victims placed in the boxes - rented at a cost of several hundred Rand a month - but many documents were recovered.