Police believe they have traced the mother of a baby boy who was abandoned on a front doorstep in Worcester in July.
The baby, who was named Joseph by hospital staff, was found outside a house in the Lower Wick area of the city on the early hours of Thursday July 18.
The woman believed to be his mother, and a man in his twenties, were arrested by police yesterday on suspicion of child neglect. They have now been released on bail.
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Police say he has links to the Hall Green and Olton areas of Birmingham and could have made his way there.
Thousands of runners took to the city's streets in this year's 10k run.
Police are appealing for witnesses who may have seen the fatal collision to come forward.