Grieving families, whose loved ones are buried at a cemetery near Ystrad Mynach, say they're disgusted after the council removed items from graves.
A petition's been handed to Caerphilly council, who have temporarily suspended work but say removing items is a policy that's been in place for years.
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Organisers say there will be increased security at the Urdd National Eisteddfod, which began in Bridgend today.
Any remaining heavy or thundery showers will clear eastwards this evening.
Over 70 firefighters are currently tackling the fire, which is now confirmed to be at a scrap yard.