77-year-old Trevor Elias, from Abertridwr, hasn't been seen since he went missing last week.
More than 300 villagers held a candlelit vigil in Caerphilly for the missing pensioner yesterday.
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While Belgium fans will heavily outnumber their Welsh counterparts in Lille, Wales know that they are unbeaten in the last three meetings.
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Chris Coleman admits his one regret at Wales reaching the quarter-final of Euro 2016 is that his father Paddy is not around to see it.