Police are desperately trying to find missing man Michael Horrocks.
Mr Horrocks is from Appley Bridge but could in the Wigan area.
Sharing two photographs of him on Twitter, Greater Manchester Police urged anybody who has seen him to dial 999.
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He is described as white, of stocky build with fair to light brown hair.
It is understood that he went missing yesterday wearing a dark T-shirt, shorts and a navy racksack.
Greater Manchester Police said they were "concerned about his welfare".
If you see him, call 999 quoting the log reference 2727-310821.
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