Thames Valley Police is appealing for witnesses following an assault which occurred in Milton Keynes.
The incident took place yesterday (6/10) at about 6.35pm in Wimblingdon Drive, Redmoor.
The victim, a 24-year-old man, was walking when he was approached by two men who asked him for a cigarette.
When he reached to get one, an unknown chemical substance, was sprayed in his face and the offenders left the scene.
The victim did not sustain any serious injuries but was taken to hospital for treatment. He has since been discharged.
The first suspect is a white man aged in his late 20s or early 30s. He is about 5ft 11ins tall with a slim build and was wearing a black or grey hooded jumper.
The second suspect is a white man, aged in his late 20s or early 30s. He is about 5ft 11ins tall with a medium build and was wearing a white or grey jumper and dark jogging trousers.
Investigating officer Sergeant James Sims, based at Milton Keynes police station, said: “I would like to speak to anyone who witnessed this incident or has any information relating to it.
“This assault could have resulted in a serious injury, and an investigation is underway.
“Members of the public can expect to see extra police patrols in the Redmoor area while our investigation takes place.
“Anyone with any details relating to this offence is asked to call the Thames Valley Police non-emergency number 101.”
If you have any information relating to this case, please call 101 quoting reference '43170297104', or contact Crimestoppers anonymously.