Murder detectives investigating the death of 83-year-old grandfather Peter Wrighton at East Harling have issued descriptions of three men they would like to speak to in connection with the incident.
Extensive inquiries are being carried out and police want to speak to three men seen in the area at the time who have not yet been located.
The men are not being declared suspects at this time.
MORE: Police explain delay in naming Peter Wrighton as victim of East Harling murder
The first man was seen changing his shirt in The Street, according to police.
He is described as white, aged in his 50s, of slim build and with grey or white hair, balding at the top.
He is thought to have been wearing heavy rimmed glasses and light-coloured trousers.
MORE: Villagers react to Peter Wrighton's brutal murder
The second man police want to speak to is a white male, of tanned complexion and between five foot nine and five foot 11.
He is of athletic build with short, dark wavy hair, dark eyes and wearing a grey or blue t-shirt. He was also wearing 'heavy duty flip flops'.
The third man is described as white, aged between 50 and 60, of medium build and with dark coloured clothing. He was seen walking without a dog in the northern area of the heath.
Detective Superintendent Andy Smith said: 'This is a complex investigation and we are pursuing many leads. As part of our comprehensive enquiries, we are now in a position to appeal directly to a number of people who may be able to provide us with information that could be vital.
'On behalf of Peter's family, we continue to ask for information. We want to hear from you if you are someone who knows this area or frequents it, perhaps to walk or run. We want to hear from you if you have seen Peter walk his dogs in that area or nearby in recent weeks or months, but especially on Saturday 5th August.
'We want to hear from you if you know someone who has information but who is, for whatever reason, reluctant to come forward themselves.
'I am extremely grateful to those persons who have already engaged with us and provided valuable information. I would like to reassure those still thinking of coming forward that, if required, we are able to treat your information in confidence. We want to piece together Peter's final days so that we can understand what happened to him and why. We know that Peter's family and the people of the local area want to understand and we want to help them to do that.'
Norfolk's County Policing Commander, Chief Superintendent Mike Fawcett, moved to address residents' concerns and said: 'A policing presence will remain in the area for the foreseeable future and I hope this provides local communities with confidence that we are here to support and protect them.
Anyone with any information should call the dedicated phone lines set up for the murder probe: 0800 056 0944 or 0207 158 001.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here