Police are appealing for information and witnesses following an assault in Royston.
The incident occurred at around 4.35pm on Sunday (26 November).
It is reported that two men knocked on the door of an address and threw what is believed to be an acidic solution towards the victim when they answered.
The victim was taken to hospital and later discharged.
The two suspects are described as wearing motorcycle helmets, with one wearing a black jacket and the second wearing a red jacket.
They are believed to have left the scene on an orange motorbike.
Detective Inspector Ben Smith from the North Herts Local Crime Unit said: “The safety of any victim is paramount and due to the nature of this incident; we are not disclosing the street address. However, I would like to reassure the public that this is believed to be an isolated incident and there is not believed to be any wider threat.
“I would like to hear from anyone who may have witnessed an orange motorbike travelling in the Royston area on Sunday. Did you see two people matching the description? If so, please get in touch.
“If you have any information that you feel could assist our investigation, no matter how insignificant it may seem, please contact me directly via [email protected].”
You can report information online, speak to an operator in our Force Communications Room via our online web chat or call the non-emergency number 101, quoting crime reference 41/94730/23.
Alternatively, you can stay 100% anonymous by contacting the independent charity Crimestoppers on 0800 555 111 or via their untraceable online form at crimestoppers-uk.org.
Do you have a doorbell cam or CCTV? If so, we would love you to join CCTV Watch so we can contact you if a crime takes place in your street. Sign up to owl.co.uk/herts and select ‘CCTV Watch.’