A police spokeswoman said there was concern for the baby's mother
The body of a newborn girl has been found in rubbish at a waste recycling plant in Cambridgeshire.
A worker made the find at the city council-owned site in Fourth Drove, in Fengate, Peterborough, at 0730 BST.
The facility has been cordoned off while the death, being treated by police as suspicious, is investigated.
A police spokeswoman said there was concern for the baby's mother, who could need medical help after the birth.
Det Insp Jim McCrorie, of Cambridgeshire Police, said his team of 15 officers had "no idea whatsoever" as to the identity of the baby, or its mother.
He said: "Police officers remain at the scene and investigations by specialist search teams are continuing throughout the afternoon.
"Naturally, our thoughts have turned to the mother of this baby and we are concerned that she may need some medical help.
"We are urging her to go to her local hospital to get the attention she may need."
A post-mortem examination carried out at Addenbrooke's Hospital, Cambridge has "proved inconclusive" but it did confirm the baby was a girl.
Further tests will be carried out to try to determine the age, ethnicity and preliminary cause of death.
A council spokesman said: "The materials recycling facility will remain closed while police continue their investigation following the tragic discovery.
"Staff remain on site and, once police have concluded their work, the facility will reopen."
The plant is operated by Viridor Waste Management Ltd.
Police have asked anyone who can help with the inquiry to call 0845 456 4564.
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