A teen arrested for shoplifting in a Victoria's Secret store was carrying a dead foetus in her shopping bag, police discovered.

Tiona Rodriguez, 17, was caught allegedly stealing luxury lingerie from the New York store on 34th Street and Broadway, according to the New York Police.

The baby was discovered as store staff searched her bag. It is believed to have been in its sixth month of development.

Local media reported that Rodriguez, from Brooklyn, had the baby the previous day, but had no idea what to do with the body. The teen was taken to hospital for a check up.

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Earlier, Rodriguez had been discussing having bad "cramps" on her Facebook page.

“It makes me feel sick. I don’t understand the thought process, to have a baby in a bag and then shoplift,” Erit Maor, a graduate student, told the NYP.

“I think it’s very strange that they didn’t shut down the store. I feel a level of disrespect,” she added.

Friends have been posting messages of support of Rodriguez's page, telling her to keep her "head up".