Bonnie Sweeten, 38, of Feasterville, made at least two 911 calls Tuesday afternoon from her cell phone, saying she was locked in a car trunk, Philadelphia police said.
Sweeten implied that her daughter was with her, but the girl is not heard on the tapes, Lt. Frank Vanore said.
The FBI joined the case along with local police in Upper Southampton Township, where Sweeten's vehicle was reportedly bumped from behind on a busy road. FBI agent J.J. Klaver said there were "inconsistencies" in the account of the accident and abduction but declined to elaborate.
"We're not really in a position to address some of these issues right now. Our priority is getting everybody back safely," he said.
The 911 calls were made in downtown Philadelphia, about 20 miles from the site of the reported abduction, starting at about 1:45 p.m. Tuesday. Sweeten's vehicle, a 2005 GMC Denali, was found downtown early Wednesday with a parking ticket that had been issued the afternoon before, Vanore said.
"Based on what she says, they supposedly took her car and she was put in another car, but right now that's all we have to go on," said Vanore, who heard the tapes. "It definitely sounds like she's afraid. ... But it's hard to tell what's going on."
The daughter, Julia Rakoczy, attended elementary school in Bensalem until she was withdrawn from classes May 1, said Susan Harder, an administrative assistant with the Bensalem Township School District.
Sweeten, who is white, described her abductors as black males but gave few details of their appearance, Vanore said.
"It was pretty generic," he said.
Sweeten has two other daughters, an 8-month-old with her current husband and a 15-year-old from a previous marriage.
Her ex-husband and the 9-year-old girl's father, Tony Rakoczy, said on NBC's "Today" show that he doesn't understand why the two would be abducted.
"There's no reason why they would keep them," he said. "We don't have money. I don't understand." He declined comment to The Associated Press.
A man at Sweeten's home refused to comment Wednesday and asked reporters to leave.
Police were still searching for the Cadillac reported to have bumped Sweeten's vehicle. The Denali was towed to police in Upper Southampton, where police planned to get a search warrant to inspect it. Detective Craig Rudisill declined to comment on any visible damage.
Associated Press writer Bill Bergstrom in Feasterville, Pa., contributed to this report.
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