After a similar robbery across the street just two weeks ago, another woman was robbed in a parking lot on Summitview Avenue.
It happened late yesterday morning in the ShopKo parking lot near 56th street.
Police say a 79-year-old woman was loading her groceries into a car when a man with a knife came up behind her and stole her purse.
The woman did fall to the ground, but she was not injured.
Police are not saying whether the two incidents are related.