Ten dogs are believed to have died after they were walked in a park at an old gasworks, prompting fears about toxic fumes.

The animals were put down after taking ill following walks in Forthquarter Park in Granton, Edinburgh.

It is understood that a dead fox was also found on the site in recent weeks, fuelling concerns.

Environmental health officers are now working with the owners of the park to investigate the incidents.

Local resident June Hoy, who walked her dog Zak at the site three or four times a day, lost her pet at the beginning of the month.

She said: "I was prescribed some antibiotics for him but they didn't help.

"Two days later on Hogmanay he was back at the vet and scans showed he was bleeding internally.

"I was gutted when I realised he would have to be put to sleep - There was nothing the vet could do as the bleeding was so bad."

Community group Friends of West Pilton has appealed for anyone else who had experienced similar issues to come forward.

A spokesman for the group said locals first alerted him to the issue a few weeks ago.

He said: "Something has gone wrong if these dogs who were fit and healthy beforehand all died such horrible deaths.

"If there is anything suspect in the park then action needs to be taken and people need to be aware of the potential danger they are putting their dog in."

A spokeswoman for the National Grid, which owns the park, said: "National Grid is working with Edinburgh Council environmental health officials to try to establish the cause of recent dog deaths which are being linked with Forthquarter Park.

"The company own the park which is on part of a former gas works site at Granton, Edinburgh and the park is managed by our property agents.

"Extensive decontamination and ground clearance works were carried out 10 years ago before the 40 acre site was redeveloped.

"National Grid can confirm that no vermin control work has been done at the park and that very limited weed control is carried out once a year at the park fence line and this is done using safe chemicals.

"The park was opened in 2007 and we are not aware of any past environmental issues except an early issue with sewage contamination of a watercourse which we resolved working with Scottish Water.

"A regime of regular chemical and bacteriological testing of the water bodies within the park is currently in place."

A city council spokeswoman said: "Our Environmental Health team are currently looking into the matter".