Police are appealing for witnesses following an assault involving a noxious substance in east London.
Police were called by the London Ambulance Service at 02:45hrs on 30 December 2018 to a residential address on Shepherds Hill in Romford following reports that a 17-year-old had been assaulted.
Officers attended and established that a liquid had been thrown in the face of the victim. He told officers that he had been approached by up to four suspects nearby as he was walking along Pages Lane.
The suspects, who had their faces covered, chased the victim before threatening him with knives. They stole his wallet and watch. It is believed that they fled the scene in a silver Toyota Prius.
The victim was taken to an east London hospital for treatment and has since been discharged.
Detectives have carried out a number of enquiries, however, as the area of the assault was not covered by CCTV cameras, they have been unable to identify the suspects.
Officers would like to hear from anyone who was in the area at the time of the assault, or who remembers seeing the Prius.
Anyone with information is asked to call the East Area Command Unit via 101 quoting reference 994/30Dec18
Alternatively, they can call Crimestoppers anonymously on 0800 555 111.
There have been no arrests and enquiries continue.