Police in Derry are investigating criminal damage caused at a number of locations in the Waterside and Cityside areas on Friday night.
Graffiti was daubed on walls and murals at locations in the Irish Street and Fountain Estate areas. A number of murals have been damaged as well as a wall of a community centre and the wall of another building.
A local community group in the Fountain also says a flare was thrown at a car from the city walls.
Police say they are investigating the incidents as sectarian hate crimes.
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Pictures from the Fountain Community Awareness and Culture Facebook Page