Knoxville police want to know if the same robber is targeting dollar stores across the city.
The latest robbery happened Monday at 7478 Chapman Highway. Just before 11 a.m., a man came into the store, showed a weapon, and demanded money.
There have been two similar robberies in the same part of town over the last few days.
Saturday night, someone held up the Dollar General in the 4200 block of Chapman Highway.
The same thing happened at a nearby Dollar Tree on Friday.
Investigators say there is no direct evidence linking the three robberies, but they are looking into the possibility.