UKIP has suspended a member who allegedly posted anti-Muslim jokes on Facebook.
North Yorkshire Police are investigating whether pensioner Tony Nixon, from Guisborough, committed any offence on the social networking site.
His Facebook account listed pages he "liked", including numerous English Defence League sites and ones expressing strong anti-Muslim sentiments.
Simon Cressy, a researcher for the anti-racist pressure group Hope Not Hate, accessed the Facebook page after he befriended Mr Nixon.
He said it included images of US president Barack Obama and his wife mocked up to look like chimpanzees.There were also racist jokes about destroying mosques, burning Muslims or knocking over a Pakistani with a bus.
A UKIP spokesman said: "We are shocked to learn about the views of Tony Nixon expressed on Facebook, which are not representative of UKIP.
"His membership has been suspended pending an urgent investigation. We do not tolerate members with any links to BNP, EDL or other extremist parties.
"We not condone racist or any other inappropriate comments and regard them as totally abhorrent and anyone else discovered acting in such an appalling way will be thrown out of the party."