The girls were trick-or-treating in the 1400 block of East Fairhaven Avenue when they were hit by a 2001 Honda CRV traveling at a high rate of speed at about 6:45 p.m.
Two of the victims were twins. They were identified as Lexi Perez Huerta and Lexandra Perez Huerta. The Huerta sisters leave behind three other siblings. Both attended Portola Middle School in Orange.
The third victim was identified as Andrea Gonzalez. She attended Santiago Charter Middle School.
Gonzalez's family is heartbroken.
"We're all broken. We don't know what to do. We don't know where to start. We haven't thought about anything," said Gonzalez's sister, Brenda.
An eyewitness later led police to the abandoned car at a nearby parking lot. The vehicle had extensive damage to the front end.
On Saturday, investigators tracked the SUV to the address where it was registered, but the owner has since moved, Santa Ana police spokesman Anthony Bertagna said.
Santa Ana police were searching for two male suspects. Authorities were also seeking video-surveillance footage from nearby property owners while interviewing witnesses.
Investigators collected evidence from the SUV, including fingerprints and DNA samples, he said.
Magaly Huerta, the twins' aunt, says her family is in complete shock.
"They killed what we love the most. Why couldn't they stop the car when they saw my nieces? Why they couldn't do anything? I know God will punish them sooner or later," Huerta said.
The families are asking for donations to help give the three teens a proper funeral. An online fundraiser has been set up to help the Huerta family with funeral costs.
Anyone with further information was asked by police to come forward. Meantime, the girls' families say, no matter what happens, it will never bring their girls back.
"Even if they're in prison a million years, they're never going to be able to repay what they took from the world, I mean, it's three innocent girls," Brenda Gonzalez said.
The Associated Press contributed to this report.