It happened around 1:30 a.m. Monday at the Riverside Drive apartment complex.
Detectives say two armed men somehow got in through a door that is usually locked. They broke into the sleeping victim's home and her roommate wasn't there.
Police say the men were in the apartment for nearly four hours, two of those hours they spent assaulting the 20-year-old victim.
"To know that it's right across the street from where I live, like literally across the parking lot - yea it's scary. It could have been me, it could have been anybody," said Vanessa Scott, neighbor.
"Very traumatic. You figure you're home in your apartment, you're safe and next thing you know you have two males busting in the apartment," said Lt. Anthony McFadden, Philadelphia Police.
Once the suspects left, the victim was able to call 911. She was treated for her injuries and interviewed by police.
"We're going to follow up on a lot of things the victim told us about and right now it's very early in the investigation and we have a lot to work on," said Lt. McFadden.
Police spent the day collecting evidence while concerned residents, many with children, were on alert.
"It's a close knit apartment place where a lot of people know each other. They greet each other, they help each other so I don't know how things can happen like this," said Anthony Brown, neighbor.
"I have two young boys. I have to make sure they're safe too and I wanna be safe," said Scott.
Police don't have much of a description on the suspects however anyone with information is urged to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.