Graffiti daubed on the walls of buildings in a market town is being treated as a hate crime, Lincolnshire Police said.
The graffiti, which appeared on a number of buildings in Horncastle overnight on Wednesday, included anti-Muslim slogans and swastikas. It also included a number of phrases, including one which read "Keep Briton White" (sic).
The force has been reviewing CCTV in an effort to catch those responsible.
Officers have also increased patrols in the area and are appealing for witnesses to come forward.