Police say they are still looking into the exact circumstances of the killings. Tiffany Barnhill, 19, and her cousin Marcedes Ivery, 21, were found shot to death at 5430 Rutland Street around 3:45 p.m. Monday.
Witnesses say three suspects, two women and a man, were seen fleeing the scene after shots were heard by neighbors.
On Tuesday night, the family of the two murdered young women made an emotional plea for justice.
"Please help us bring closure to myself and my family. You know who you are, just have a heart. Just help the police, help my family. Anybody who knows anything, knows the girls, anything, please just come forward so we can have closure and peace to be able to deal with this a little bit easier," Tiffany Barnhill's sister Kelly Hunt said to Action News.
Police say there were signs of forced entry through the front door.
Family members tell Action News that Barnhill had broken up with her boyfriend earlier in the day and had gone to Ivery's home to talk about it.
Investigators say it may seem logical to focus on the Valentine's Day breakup as the motive for these murders. But homicide detectives tell Action News this morning they are considering a number of possible motives.
"The family has been great, they've talked to investigators, they've given us several leads that we are in the process of tracking down," said Capt. James Clark of the Philadelphia Police. "Hopefully we'll be able to get this killer and bring him to justice very shortly."
Meanwhile, the victims' families are devastated.
"All I could say is, it was a senseless tragic act, it should have never happened to anyone," relative Tamika Scott said.
Relatives say the victims were inseparable.
"They were lovely girls, I'm going to miss my niece, I just can't understand who would do something like this to them," relative Cheryl Nesmith said.