Detectives have released an image of a man wanted in connection with an attempted robbery in Clacton.The incident happened at Knox Field off Knox Road, at about 12.10pm on Tuesday April 16.
The victim, a local woman in her 20s was walking across the field when a man approached her grabbed her by the arm and told her to empty her pockets.
But a man walking his dog nearby saw what was happening, shouted at the suspect and rushed to help the woman. The suspect then ran off.
He's believed to be in his mid-20s, about 5ft 3in tall, of slim build and of mixed heritage. He was wearing a grey hooded top and grey tracksuit bottoms.