A Brazilian woman who claimed to lose her unborn twins in a skinhead attack was not pregnant and probably carved the initials of Switzerland's main right-wing party into her own skin, investigators said Friday. Police said in a statement that 26-year-old Paula Oliveira was not three months pregnant Monday, when she claimed that an attack by three skinheads, one with a Nazi symbol tattooed on the back of his head, caused her to miscarry twins. Zurich University forensic medicine chief Walter Baer said "any experienced forensic doctor would not hesitate to assume that this was a case of self-infliction." All of the wounds were reachable by hand and none were severe, he said. Areas particularly sensitive for women - the breasts, navel and outer genitals - were not injured, he said. He added, however, that an investigation was still ongoing.