It happened just before 8 am on Blackstone and Effie.
When police arrived, they found a victim with a stab wound to the right rib cage and back.
Investigators say the person was riding their bike with a friend on Belmont when someone came out of the neighborhood.
The victim and suspect got into an argument, and the suspect pulled out a small hatchet and stabbed the person.
They were taken to the hospital.
Police say this investigation is ongoing.