A man came up to a woman walking her dog and committed a sex act on himself.
The victim, a woman in her sixties from the Harwich area, was in an alleyway, off Harcourt Avenue, at about 7.30am on Tuesday, when a man approached her and pulled down his tracksuit bottoms.
He is described as white, aged about 16 to 20, about 5ft 8ins tall and was wearing a black and grey hoody and dark tracksuit bottoms. He had a scarf covering part of his face.
Anyone with information should call police on 101. Alternatively, call independent charity Crimestoppers anonymously on 0800 555 111.
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