Prayers have been said at church services in Turkey and Northern Ireland for the two murder victims.
Marion Graham and her best friend Kathy Dinsmore, both aged 53, were stabbed to death while on holiday in the resort of Kusadasi in southern Turkey.
Prayers for the victims were said in churches in Kusadasi - a beach resort on the Aegean Sea which is very popular with Irish and British holidaymakers.
The women were also remembered at Sunday services 60 miles north of Kusadasi in the city of Izmir where their bodies were discovered in a forest.
The families of both women live in the south Down area - across Warrenpoint, Newry and Mayobridge. The double murder has stunned the whole community.
At Masses throughout the area prayers were said for the women and their relatives and friends.
Bishop of the Dromore diocese, John McAreavey, said he was "deeply distressed" to hear of the women's deaths.
"I know that at Mass tonight in the cathedral and in the different parishes we will be carrying these families in prayer," he said.
"Anything we can do to support these families at such a horrendous time, we will do."
The bishop is an uncle of John McAreavey, whose wife Michaela was murdered while on honeymoon in Mauritius last January.
He said the killings brought back painful memories of that time and he felt a "real sense of solidarity" with the families.