NEW YORK (CBSNewYork/AP) — A serial kidnapper now faces charges after police said she tried to snatch a baby off the street in Chelsea.

Tara Anne McDonald, 46, is charged with attempted kidnapping and acting in a manner injurious to a child under 17, police said.

On Thursday, a 43-year-old nanny was pushing an 8-month-old boy in a stroller, when McDonald allegedly came up to talk to them, police said. McDonald then allegedly tried to grab the stroller from the nanny.

The incident happened around 5:30 p.m. on Eighth Avenue near 17th Street, sources told CBS 2.

Authorities said a bystander intervened to foil the abduction attempt.

“She was saying, “‘You’re a liar! These are my babies!”’ said UPS driver William Marte, who was nearby. He noticed the struggle and stepped in to help.

“I told the lady, ‘Let it go — just keep going,”’ and she did, he said.

The woman was gone when police arrived. They found the suspect after putting up fliers with a sketch.

Marte, 51, said he “did what came from my heart.”

“I’ve got two kids. I did what I was supposed to do,” he added.

McDonald previously spent more than a year in prison for a kidnapping in Florida. In New York she’s had five prior arrests for kidnapping.

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