Officers are appealing for information and witnesses following a report of a serious sexual assault in Wheathampstead.
At around 1.30am on Sunday, June 19, a woman in her thirties was walking through Marford Playing Fields in Marford Road when she was approached by two males.
They are reported to have sexually assaulted her before running off towards the River Lea.
Both males spoke with Irish accents, were slim and wearing dark coloured clothing. One of the males was described as around 5ft 9in tall. The other was wearing something covering his face – potentially a bandana.
The victim is being supported by specially trained officers.
Detective Chief Inspector Sam Khanna said: “We are still piecing together what happened but in the meantime I urge the public to stay vigilant. I know this news will be alarming but please be assured we are working around the clock to find those responsible.
“We would like to hear from witnesses and those with information about what happened. Any information, no matter how small it might seem, could be vital.
“If you were driving in the area around the time of the incident and have a dash cam, please check it and get in contact if you spot something that might help.”
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, quoting crime reference 41/48575/22.
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.