The two women aged 29 and 37 fought over some loan issues.
The older woman owed the younger one K500 but had been in hiding until she was caught near the TST four mile area.
As shocked on lookers watched the 29 year old woman attacked the other woman in the car park of the shop.
Police report that the two women were pulled apart by members of the public who brought them to the Boroko police station to be dealt with.
Meanwhile, another woman was arrested this morning after she tried to stab her husband at the same location, the main 4 mile bus stop.
The woman, originally from Chimbu, took out a knife and tried to stab her Goroka born husband who was allegedly cheating on her with another woman.
The woman is being detained at the Boroko police station as well.