Serbia's war crimes prosecutor Vladimir Vukcevic said Monday that he will seek the extradition of an accused Nazi living in the US. Peter Egner is accused of working with a Nazi mobile unit that murdered thousands of Jews, Gypsies and political dissidents in Serbia during World War II. Vukcevic said he will seek the 87-year-old Egner's extradition once he is stripped of his US citizenship. Egner, who is living in Bellevue, Washington, has been trying to stop the US federal government's efforts to strip him of citizenship. The US Justice Department filed a lawsuit against him in July.