Police from Lincolnshire believe a missing 83-year-old man may be in Leicestershire.
Officers searching for Jack Foster believe the pensioner, who went missing four days ago, may have boarded a bus to Bottesford.
Inspector Richard Hammond, from Grantham police station, has appealed to people in the county to be on the look out for Mr Foster.
He said that someone who knows Mr Foster saw him at Grantham bus station.
Insp Hammond said: "That person was on the Long Bennington bus and saw Jack waiting at Stand 5 – from where buses go to Bottesford in Leicestershire – and thought it strange that Jack was not getting on the Long Bennington bus.
"It is not known if Jack caught the Bottesford bus or was just using stand 5 whilst waiting for another bus.
"He could have even returned to Grantham town centre, the trail stops at this point in time."
That sighting was at about 2.35pm on December 23 when Mr Foster was wearing the clothes in the latest photograph.
He was wearing a brown three-quarter length anorak type coat with a hood, what appears to be a green deer stalker hat, dark trousers and brown shoes.
Insp Hammond, who is leading the search for Mr Foster, said: "If Jack has not had shelter for the last four nights since he was last seen – particularly last night when it snowed heavily – we are concerned he possibly could not have survived that weather.
"We have previously asked people living in the north part of Grantham to check their outbuildings and sheds for any trace of someone sheltering there.
"In view of the new information from the bus station, we are now widening our search into Leicestershire and asking our colleagues there, particularly in the Bottesford area to conduct similar searches and enquiries to the ones we have been making."
Mr Foster went to Grantham Hospital on Tuesday 23rd December 23 for treatment to a fractured shoulder.
Due to that and his age he has very limited mobility and tends to shuffle rather than walk.
Insp Hammond said: "He has a distinctive gait and that coupled with the deer stalker hat, long brown anorak type coat anyone seeing him should remember him.
"We need to hear from anyone with any information and we ask them to call 101 and quote Lincolnshire Police Incident number 392 of December 23."
