A flag bearing the Parachute Regiment insignia has been put up on a lamppost outside St Comgall’s Church in Antrim.
Union flag bunting has also been strung across the street in front of the landmark church, which is within view of the town’s PSNI station.
The offensive flag carries the regiment’s winged insignia with the slogans “No apology” and “No surrender”.
The regiment was responsible killing 14 Catholic civilians in Derry on Bloody Sunday in January 1972.
Months earlier, in August 1971, members of the regiment also killed 11 Catholic civilians over several days in Ballymurphy in west Belfast in what became known as the Ballymurphy Massacre.
Former British Prime Minister David Cameron apologised for the Bloody Sunday killings in 2010.