""This is a bad time to be a black man in Libya," reported Alex Thomson on Channel 4 News on Sunday. Elsewhere, Kim Sengupta reported for the Independent on the 30 bodies lying decomposing in Tripoli. The majority of them, allegedly mercenaries for Muammar Gaddafi, were black. They had been killed at a makeshift hospital, some on stretchers, some in an ambulance. "Libyan people don't like people with dark skins," a militiaman explained in reference to the arrests of black men. The basis of this is rumours, disseminated early in the rebellion, of African mercenaries being unleashed on the opposition. Amnesty International's Donatella Rivera was among researchers who examined this allegation and found no evidence for it. Peter Bouckaert of Human Rights Watch similarly had not "identified one mercenary" among the scores of men being arrested and falsely labelled by journalists as such. Lurking behind this is racism. Libya is an African nation – however, the term "Africans" is used in Libya to reference the country's black minority. The Amnesty International researcher Diana Eltahawy says that the rebels taking control of Libya have tapped into "existing xenophobia". The New York Times refers to "racist overtones", but sometimes the racism is explicit. A rebel slogan painted in Misrata during the fighting salutes "the brigade for purging slaves, black skin". A consequence of this racism has been mass arrests of black men, and gruesome killings – just some of the various atrocities that human rights organisations blame rebels for. The racialisation of this conflict does not end with hatred of "Africans". Graffiti by rebels frequently depicted Gaddafi as a demonic Jew." (thanks Laleh)