A female dog walker was punched in the stomach with a "sharp implement" in an alleyway in Chelmsford yesterday (Thursday November 27).
The woman was left with minor injuries after the assault which occurred off Braganza Way between 2.15pm and 2.30pm.
Police want to track two suspects described as black and aged in their late teens.
The first was around 6ft tall, with a slim build and wearing a dark hooded top.
The second was around 5ft 10, with a stocky build and was wearing a grey tracksuit style top and trousers.
Officers are investigating the possibility that the assault was targeted against the victim.
Investigating Officer Pc Ben Hall said: "I would like to speak to anyone who saw anything suspicious around the time of the assault and I would especially like to speak to a woman in her 40s who was seen walking two white Chihuahua type dogs nearby."
Anyone with any information is asked to contact Pc Hall at Chelmsford police station on 101.
People can also give information to the independent crime-fighting charity Crimestoppers anonymously on 0800 555 111 or through their Anonymous Online Form at www.crimestoppers-uk.org
