Police have re-appealed for information about a 67-year-old man who went missing from Leicester a week ago.
There have been no positive sightings of Arthur Prosser since he left his home on Saxon Street at about 1030 GMT on Friday 3 December.
Officers said his family were becoming very concerned for his well-being.
Mr Prosser has Parkinson's disease, which can be affected by the cold, and does not have his medication with him.
Police are putting posters up in the Narborough Road area and on buses Mr Prosser may have used.
Mr Prosser is described as white, approximately 5ft 9in (1.75 m) tall, with grey receding hair and of medium build.
He was wearing green trousers and a distinctive dark green jacket with a white tick on the back.
One possible sighting suggests that Mr Prosser was on Narborough Road, near to Londis, at about 1430 GMT on Friday 3 December carrying Iceland shopping bags.
Insp Ross Dimmock, of Leicestershire Police, said: "We have had a number of calls from members of the public, which is really encouraging and shows that people are keen to help."