A group of walkers claimed they were stalked by a "growling" big cat for more than a mile when they got lost at a popular beauty spot.
A female hiker said the group was followed by the 'panther-like' creature in Woodchester Park, Gloucestershire about a month ago.
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She made contact with local big cat expert Frank Tunbridge following recent reports of a big cat roaming near Stroud, Gloucestershire Live reports.
The woman said: "I have seen the big black panther - it was a panther, it was as clear as day.
Big cat tracker Frank Tunbridge was contacted by the group following the incident
"Myself my partner and about five others were walking up Woodchester Park and we got lost in the woods and found ourselves back at the cars at 11pm.
"On our way back up the drive we saw yellow eyes in the trees, like it was following us.
"There was a growl the closer we got to the cars at that point we got scared and ran to the cars and put the lights on - there it was right in front of us.
"It then jumped over the fence in to the long grass where it seemed to be stalking us, growling.
The woman said she was convinced the creature was 'panther-like'
"We were trying to get a picture but it was just too dark. This was only four weeks ago and again last week we saw the same eyes in the tree line, deeper in by the lakes.
"It was not a puma, as it was too small - it was black with yellow eyes and slinked like a moggy.
"It was a big cat - no other animal can move like it."
In 2012 experts carried out DNA tests on the carcass of a roe deer found at the National Trust site
She said the animal tracked them from Woodchester Park boathouse to the car park, a distance of 1.3 miles.
There have been hundreds of big cat sightings in Gloucestershire and particularly in and around Stroud over the years.
Mr Tunbridge said the park, with its wide, wooded valleys would be an ideal habitat for a big cat.
"It was probably just seeing them off," he said. "It could have had cubs, who knows? They were there late at night and the cat would have laid low during the day."
Woodchester Park is run by the National Trust.
In 2012, a spike in interest in big cats at the parkland emerged after Warwick University academics were drafted in to examine the killing of deer.