A newborn boy has been found abandoned on a doorstep in Worcester.
The baby was found wrapped in a bag in the Lower Wick area of the city in the early hours, said a spokesperson from the Worcestershire Royal Hospital.
The child is being looked after by nursing staff, who have named him Joseph.
Patti Paine, head of midwifery at the hospital, said Joseph was in good health but it was "very important" his mother sought medical attention.
A 24-hour phone line has been set up by the hospital, in order for the mother to make contact.
"Joseph was found dressed in a baby grow and wrapped in a blanket and bag on a doorstep of a home in Lower Wick," said Ms Paine.
"The doorbell was rung and the occupant found him and rang the emergency services."
'Concealed pregnancy' theory
She added it was thought Joseph had been born full term - or around his due date - in the last 24 hours and weighed 5.5lbs (2.5kg).
Ms Paine said: "It is likely Joseph was delivered outside a hospital and this was possibility a concealed pregnancy so it is very important his mother comes forward.
"She may be in urgent need of medical attention. We can arrange a midwife to come to her if she contacts us but would rather not come to hospital."
West Mercia Police have asked anyone with information to call 101.
'Clean and clothed'
Det Ch Insp Stacey Williamson, from the force, said police were called at about 04:30 BST.
She said Joseph was found in "a hessian shopping bag" which had the words "Woolworth's - The Difference, A Community Based Project" written on it.
"If anybody in that area saw any person carrying a baby or pushing a baby or anything they feel may contribute to our inquiries, please contact the police," said Det Ch Insp Williamson.
"Like the health service our priority is finding baby Joseph's mother."
She added Joseph was found "clean and clothed" and that someone had obviously been caring for him.
It is not known if the mother had left the child at the door, but whoever had left Joseph had made sure he would be discovered, she said.