Burton upon Trent, UK - Police have seized several computers after receiving complaints about "inflammatory" posters and leaflets displayed during a Muslim festival.
The posters, displayed during the annual "March for Mohammed" in Burton upon Trent on 23 March, apparently contained anti-US remarks, police said.
Five addresses in the town were searched and literature also seized but no one was arrested, a spokesman added.
Officers delivered letters to residents explaining why police were in the area.
The march was attended by about 300 people last month and is held to celebrate the Prophet Mohammed's birthday.
Police searched properties in Harlech Way and Kingsmead, in Stretton and in Sydney Street, Derby Road and Derby Street in Burton.