Confectionery giant Cadbury has launched an investigation into claims live insects were found in Dairy Milk chocolates in India.
Public health officials in the western Indian state of Maharashtra told the BBC they have ordered the state-wide seizure of all Dairy Milk chocolates, starting with stockists in Bombay.
A Cadbury spokeswoman told the BBC: "We are concerned about these reports and are investigating it as a matter of urgency."
Cadbury is India's leading chocolate company and sells more than a million bars in the country every day.
Uttam Khobragarhe, chief of Maharashtra's Food and Drug Administration (FDA) told the BBC it had found living as well as dead insects in two different samples of the chocolates.
Mr Khobragarhe said he would now issue a notice to the company to explain how insects got into its products.
If the FDA is not satisfied with the reply, it is authorised to order the closure of Cadbury's factories in the region.
But a spokeswoman for Cadbury's India said just one infestation had so far been discovered.
And it was almost certainly the result of the way the chocolates had been stored by a retailer rather than any problem at the factory.
She said Cadbury's had yet to be contacted by Maharashtra's Food and Drug Administration (FDA).
And the issue had been "blown up out of all proportion" by the local media.
In August, Maharashtra's FDA stirred up controversy after it discovered pesticides in locally-bottled Pepsi and Coca-Cola, although the plants were later cleared by government reports.