A dog-owner died after getting into an argument with another man over their pets.
74-year-old Peter Morley was walking his small, brown terrier-type dog, called Bella, in Turkey Road, Bexhill, when it is believed she was attacked by two Staffordshire bull terrier-type dogs.
There was then an argument between Mr Morley, of Jubilee Road, Bexhill, and the owner of the two dogs.
Mr Morley fell to the ground and suffered a head injury.
After his dog ran away, another man came to help Mr Morley.
The argument happened at about 10am on Sunday, July 20 but Mr Morley died ten days later.
Police officers are hoping to trace the owner of the two dogs as well as anyone who saw the argument taking place or Mr Morley falling.
Detective Chief Inspector Rachel Bacon said: "We think Mr Morley had an argument with the man with the dogs and we are appealing for that man to come forward and talk to us."
Police are also appealing to speak to the other man who helped Mr Morley when his dog ran away.
He is described as a white man in his 30s with a brown beard.
Anyone with information should call 101 or email email@example.com quoting Operation Cafe.