Gloucestershire Constabulary would like to speak to a man whose dog bit a runner on Bibury Road, Cheltenham.
The incident happened at approximately 9am on Sunday 27 December near Benhall woods and park. A man was running past another man believed to be in his 70s when his dog lunged and bit the runner causing two puncture wounds.
The dog is described as a dark grey greyhound.
Officers have investigated the incident and are now appealing for the public's help to identify the dog’s owner.
If you are the owner, or have any information on his identity, please call police on 101 and quote incident number 162 of 27 December.