Update: The girl has admitted to Sandy police that there was no attack and she was injured in a bicycle crash.
Original story below
SANDY, Ore. - A 15-year-old girl who has several broken bones and cuts to her face told Sandy police that three men attacked her while she was riding her boyfriend's bicycle Saturday night.
"They broke her back, several bones in her face, her collar bone and her wrist," said Cari King, the girl's aunt.
King said her niece rode her boyfriend's bike down the street and didn't come back. That's when the girl's boyfriend went looking for her.
"He found her unconscious on the ground and carried her back to the house and called for help," she said.
The girl told police the men stole the bike after the attack at around 11:15 p.m.
The girl's boyfriend and family found the bike with front tire damage in some bushes on Sunday afternoon near the intersection of Cascadia Village Drive and Bornstedt Road. No blood was found at that scene or on the bike, according to police.
A witness who lives nearby told police that she saw someone riding the bike before hearing a crash around the time the girl said the attack occurred. She didn't see anyone else in the area, police said.
Police are unsure where the attack occurred.
The girl, whose name has not been released, was taken to a Portland hospital. Her condition is unknown.
"I don't understand why anybody would attack a kid in her slippers with that kind of senseless violence," said King.
Police said they don't believe there is any danger to the public at this time. Anyone with information about the attack is asked to call the Sandy Police tip line at 503-489-2195.
KATU's Bob Heye contributed to this story.