At 4am on Saturday 20th March, emergency services were called to the seafront on Cornwall Avenue, Peacehaven after a 21 year old local woman had been found lying there with serious injuries.
The woman had called the ambulance services herself telling them she had fallen.
She was soon after taken to The Royal Sussex County Hospital in Brighton.
The incident is currently being treated as unexplained through not suspicious, and an investigation is underway.
Police are calling for residents and locals to come forward with any CCTV or dash cam footage to come forward.
Detective Inspector Claire Gill said; “From our enquiries so far it appears that the young woman had walked along nearby Arundel Road, then across the main A259 South Coast Road and into Cornwall Avenue, then falling from the top of the cliff, some 60 feet.
“At this time there is no evidence of any third party involvement, but we are making enquiries in the area and would like to hear from anyone with information.
“We would particularly like residents in that area to check any dashcam or door bell footage for the period between 2.30am and 4am so that we can see if it contains anything that might help the investigation.
“The woman, who is white, has blonde hair, and was wearing a black coat, blue jeans, and was carrying a torch.
“If you can help please contact us either by calling 101 or online, quoting Operation Middle.”