The body of a newborn has been found at a waste management plant, just two years after a similar discovery at the same site.
West Yorkshire Police are appealing for the baby's mother to come forward and officers have "serious concerns" about her health.
The baby was discovered on Wednesday evening by staff at the Associated Waste Management site on Valley Road, Bradford, which processes material from homes in Leeds and Bradford.
Police said they are working to find out where in West Yorkshire the baby may have come from.
A full post-mortem examination is scheduled to take place later today to determine the cause of death but it is believed the child was only very recently born.
Detective Superintendent Mark Ridley, from West Yorkshire Police's Homicide and Major Enquiry Team, said: "My priority is the condition and welfare of the mother and ensuring she receives the medical care she needs.
"The mother has clearly been through a terribly traumatic experience and I would ask her to come forward and speak to us."
Talking to the Bradford Telegraph & Argus, AWM business development director Tim Shapcott said the discovery of the body had created a sombre mood amongst staff who were sorting waste collected in Bradford and Leeds.
“It was not pleasant and was quite upsetting for the men and the supervisor who witnessed the find,” he said.
Mr Shapcott added that after the previous find, the company and the local community had come together to help pay for a funeral for the first baby girl.
“We would not hesitate to do the same this time,” he told the T&A.
Anyone with information is asked to contact the Homicide and Major Enquiry Team on 101, or by calling Crimestoppers, anonymously and in confidence on 0800 555 111.