A teenager was attacked by a dog in Thornes Park.
The 17-year-old was near the model railway when a brown and white Staffordshire bull terrier grabbed hold of his leg.
As he tried to push the dog away it bit him on the hand twice and also attacked the his own dog.
Police said the owner of the Staffordshire bull terrier was aged in her late 20s to 30s, with short pink or red hair and a facial piercing.
She was wearing jeans and ‘Ugg’ boots.
The dog was wearing a pink collar and purple harness.
The incident happened on Thursday, March 27, at around 2pm.
PC Helen Hardcastle, of the Central neighbourhood police team (NPT), said: “I would urge anyone who was in the Thornes Park area and believes they may have seen the owner of this dog or anyone else with information about the dog owner’s identity to call the Central NPT on 101.
“This also serves as a timely reminder to all dog owners of their responsibility to ensure their dogs are kept under suitable control when walking them.”