

Barack Obama's campaign team today accused Hillary Clinton's beleaguered staff of mounting a desperate dirty tricks operation by circulating a picture of him in African dress, feeding into false claims on US websites that he is a Muslim.

Obama's campaign manager, David Plouffe, described it as "the most shameful, offensive fear-mongering we've seen from either party in this election." Obama has had to spend much of the campaign stressing he is a Christian not a Muslim and did not study at a madrassa.

The picture showing Obama in a turban during a visit to Kenya in 2006 first appeared on the Drudge Report website today.

The site said it was circulated by Clinton's staffers and quoted one saying: "Wouldn't we be seeing this on the cover of every magazine if it were [Clinton]?"

The picture was taken when Obama went on a visit to Africa as a senator. Obama, whose father was Kenyan, visited Wajir in the Kenyan north-east, close to the Somali and Ethiopian borders, and was dressed by locals as a Somali elder.

The Clinton team hit back at the criticism today, saying Obama's team had turned the picture into a row to distract attention from a foreign policy speech she gave today.