Six windows have been smashed at a church in Cloghogue near Newry, with four more smashed at an outside toilet.
The criminal damage was reported at around 9am on Friday at the church on the Dublin Road.
It is believed the cost of repairing the damage could run to thousands of pounds.
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PSNI Inspector Kelly Gibson said: “We received a report around 9am on Friday, 13th January that six windows in the church and four of an outside toilet had been smashed overnight.
“The windows require specialist repair and it will take a significant amount of time to fix the damage, which is expected to cost in the region of many thousands of pounds.
“We would appeal to anyone with information in relation to this incident, or who may have noticed any suspicious behaviour in the area between Thursday January 12 at midnight and Friday January 13 at 8am to contact police on 101, quoting reference number 310 of 13/01/23.
"A report can also be made online via http://www.psni.police.uk/makeareport/.
“You can also contact Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/ .”
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