The incident happened on the 1000 block of Tyler Avenue around 4 p.m.
Both victims suffered non-life-threatening injuries and were transported to an area hospital, police say.
Neighbors in the area told Action News a group of teenage boys were in the neighborhood and started a fight around the time of the incident.
Police have not confirmed the ages or identities of either of the victims.
Despite this, neighbors went on to say that they believe the victims are teenagers.
"When I got off work I seen a group of kids coming up, they got into an altercation, fighting. Next thing you know I see the ambulance, from what I understand one of the kids got stabbed," said Matt Dillon from Darby.
Residents also said the neighborhood is usually quiet.
"I've lived around here 12 years, we never had any problem like this. We are all close together, and this is unacceptable. This is new," said Diane from Darby.
After the stabbing, many in Darby said they're worried about what the summer will bring.
"Summer hasn't started yet and I'm worried. Our kids come out here, they be out here playing all the time. All our neighbors have kids," said Diane.
Once again, police have not confirmed any information on the ages or identities of the victims.