Police have closed an investigation into the assault and robbery of a child after a picture appeal failed to lead to new lines of enquiry.

The alleged attack happened in Nordelph Corner in Hardingham, near Wymondham, at about 7am on September 23 last year.

The child suffered minor injuries after being assaulted by a woman who then stole a mobile phone. 

Police said they wanted to speak to a woman aged between 40 and 50 who was wearing a black anorak, a grey beanie hat and glasses in connection with the incident.

The issued images of the woman walking a spaniel dog in the hope that she might be recognised.

Police have now confirmed the probe has been discontinued.

A spokesman said: “All lines of enquiry have been exhausted and the case has been closed. We will always review any new information provided to us.”

Nordelph Corner includes access to a listed monument of medieval enclosures with a causeway that is popular with hikers and dog walkers.

Anyone with information should call 101 quoting crime reference 36/74067/22.