Families will gather at Our Lady’s Island in Wexford to remember those who have vanished without trace.
Following Mass at the sacred site, a procession will follow the cross on its journey around the island.
The families of missing Wexford woman Fiona Sinnott; Kildare girl Jo Jo Dullard; Dublin boy Philip Cairns and Offaly woman Fiona Pender are due to attend.
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