"'Entertainment Tonight' was told before the broadcast that their information came from an impostor," said the second person. Both people spoke on condition of anonymity because they were not authorized to comment publicly.

The people said there were several conversations Friday, by e-mail, text message and telephone, between Goline and "Entertainment Tonight." Meanwhile, the story was quickly challenged by several other celebrity news outlets.

The TV show stood by its story Friday night, with host Mary Hart saying on the air, "Just this morning, a source who says she was inside the delivery room tells us yes, the babies were born and yes, mother and babies are fine."

Later that night, the manager of Jolie's partner, Brad Pitt, told AP that the babies had not been born.

The show said in a statement Wednesday that it first learned of an impostor from a letter from Jolie's attorney Monday — three days after the broadcast.

"'Entertainment Tonight' takes this very seriously and is, of course, concerned that the show may have been victimized by someone allegedly posing as a member of Ms. Jolie's team," the statement said. "We are actively investigating the matter and are reaching out to law enforcement agencies."

The show has not mentioned the story on the air since the initial report, and the story has been deleted from its Web site.

The 27-year-old program is the top-rated entertainment newsmagazine on television, with an average nightly audience of 6.6 million viewers, more than double any competitors. The twins, who Jolie says are due in August, are one of the biggest stories of the year in celebrity journalism, with their first photographs expected to fetch at least $10 million. (The first pictures of Shiloh Jolie-Pitt reportedly fetched a $4 million donation to charity from People magazine.)