Man sought over Derby dog attacks
Two men required surgery after being bitten by a dog in Derby.
A 76-year-old man and his Chihuahua were bitten by a black dog near Shelton Lock at 1415 BST on 18 September, police said.
The man was bitten on the forearm and his pet suffered a broken leg and injuries to his paw and stomach.
The dog's owner, who later ran off, then told the animal to attack another man who was bitten on both legs. Police have appealed for information.
The man who ran off with the dog is described as being of mixed race, in his 20s, with dark cropped hair. He was wearing a red hooded top with a yellow logo and dark jeans.
'Very vicious attack'
During the attack, the 76-year-old man had picked up his pet to protect it, but the black dog jumped up and bit him and his pet.
The second man, who was his 41-year-old brother-in-law, was attacked after they tried to convince the dog owner to stay while they called police.
Det Ch Insp Sam Slack said: "This is a very vicious attack. Firstly on the victim and his dog but then, of even greater concern, is the report that the dog was then set on another man deliberately.
"We are very keen to speak to people who may have seen the incident or anyone who may have seen this dog or the man with him in the area recently."