Police spokesperson, Warrant Officer Joseph Swartbooi says that these incidents are unrelated.
In the first, four unknown armed men entered the post office in Centre Point mall and threatened the staff.
They fled the scene with an undisclosed amount of cash.
The suspects are yet to be arrested.
About 30 minutes later, seven unknown gunmen entered the post office in Montague Drive.
They threatened the staff and fled the scene with cash from the premises.
Swartbooi says that no one was injured in either incident, nor were there any shots fired.