Police are currently investigating a serious assault that is reported to have occurred in a wooded area near to Radlett Road Playing Fields, Watford, on Wednesday.
A cordon is currently in place and officers are continuing to investigate.
The victim (female) is being supported by officers.
Detective Constable Caroline Niwaz said: “I know that news of this incident will cause concern among the local community and I would like to reassure you that officers are working hard to identify those responsible for this assault. While this work is on-going you can expect to see an increased police presence in the local area.
“I would like to urge anyone who believes they have information that could help our enquiries to get in touch by emailing me directly email@example.com or using the contact details below.”
Anyone with information is asked to contact police quoting crime reference 41/23321/21.
You can report information online at herts.police.uk/report, speak to an operator in the Force Communications Room via the online web chat at herts.police.uk/contact or call the non-emergency number 101.