American observers have reported "grotesque anti-Catholic displays" during last year's Orange Order parades in the North.

A group of US observers has criticised the PSNI for allowing known loyalist paramilitaries to parade through Catholic areas during last year's marching season in the North.

Two groups of US observers who monitored Orange Order parades in the North last year have criticised what they said was a loyalist paramilitary presence at the marches.

A report due to be published today is expected to criticise unionist politicians over their ambivalence to the displaying of paramilitary flags at loyalist parades.

Two US organisations focusing on human rights in Ireland have expressed concern about the potential for violence at Orange Order marches this summer.