Police are appealing to trace a jogger who may have been a witness following a sexual assault.

The assault happened on the cycle path in Riverside Recreation Ground, off Riverside Road on Friday (September 11) at 7.20am.

The victim, aged in her 20s, was walking when she was approached by a man who grabbed at her trousers and sexually assaulted her.

The victim screamed and moved away before the man ran off in the direction of Oxhey Park.

Police say the offender was described as white, in his 30s, and 5ft 11inch tall. He had dark hair and was wearing navy tracksuit bottoms and a grey hoodie, with the hood up.

Police believe a woman who was jogging at the recreation ground may have vital information to help the inquiry.

Detective Inspector Jason Finnegan, from the Watford Local Crime Unit, said: “We appreciate that an incident of this nature will worry the community and I want to reassure the public that we already made extensive enquiries. The victim is safe, and we are supporting her as the investigation progresses.

“We understand that at the time of the offence, there were several other people in the park – including a female jogger who passed the victim and the offender just before the incident.

“Were you jogging in the park at 7.20am on Friday morning? Did you see anyone acting suspiciously? If you have information you believe could be useful to our inquiry, then please get in touch as soon as possible.

“This is an understandably concerning incident and we have already undertaken a number of enquiries since this was first reported to us. We are currently considering a number of tactics in our efforts to identify and locate the suspect.”

You can email DC Vishal Khanna at vishal.khanna@herts.pnn.police.uk, report information online at herts.police.uk/report, through webchat on herts.police.uk/contact, or call the non-emergency number 101 quoting reference 41/72787/20.