A replica of a mosque on top of a bonfire is being treated as a "hate-motivated criminal offence", police have said.
The bonfire, in Moygashel in County Tyrone, Northern Ireland, has featured other controversial displays in the past.
Police said a 56-year-old man had been arrested on suspicion of displaying threatening, abusive or insulting material which is intended to stir up hatred.
Kashif Akram from Belfast Islamic Centre said the display was distressing and insulting to people from his community.
In a statement, the Moygashel Bonfire Association said the bonfire combined cultural expression with political protest and that the display was not targeted at individuals but at "ideology and government policy".
Resist Comment. The mosque replica is unacceptable. However, so is muslim terrorism and muslim gang-rape of underage girls. Will the islamic community address these crimes?