A dog was so severely injured in a stab attack that he had to be put to sleep.
The seven-year-old male brindle and white bull lurcher was left with a number of wounds to his neck following the incident in Pennywell, Sunderland.
The dog was taken to out-of-hours vets for emergency treatment by his owner.
However, despite being cared for by the surgery for a week, he was so badly hurt by the stabbing the pet had to be put down.
RSPCA Acting Chief Inspector Helen Nedley said: “It’s not clear what happened to this poor dog, other than that he was very badly injured.
“The incident happened around 5pm near the Hylton Road/Prestbury Road area of Pennywell in Sunderland.
“We want to hear from anyone who saw anything, or has any specific information that might help my investigation.
“Very very sadly, despite being under vet care for a week, his injuries were so severe that he had to be put to sleep on veterinary advice.”
Anyone who thinks they can help should call the RSPCA inspector appeal line on 0300 123 8018 and ask to leave a message for Acting Chief Inspector Nedley.
The attack happened on on Saturday, July 28, which was the weekend of the Sunderland International Airshow.
To help the RSPCA continue to investigate incidents such as this please visit www.rspca.org.uk/give.