The victims are 3, 9 and 37 years old. The suspect, who is believed to be the father, is in custody, according to police.
Investigators say they believe the crime occurred is a "domestic situation." The 37-year-old woman is said to be the mother of the two children.
The incident happened in a house on Cushing Street between Oak and Ash.
Crime has been on the rise in the area, according to some residents.
"People need to communicate a lot better, they need to communicate with their neighbors," said resident Terry Feys.
Stay with FOX 2 for more information as it becomes available.