CAIRO (AFP) - Egyptian police raided more than a dozen offices belonging to local and foreign rights groups on Thursday, as part of an investigation into alleged illicit foreign funding, an official statement said. At least two US rights groups -- the National Democratic Institute (NDI) and the International Republican Institute (IRI) -- are being targeted by the operation, judicial sources said. The raids, in which no arrests were reported, came as the authorities blamed foreign-funded groups for political unrest in the country after an uprising ousted president Hosni Mubarak in February. Police special forces blocked the entrance to the NDI offices in a Cairo villa as men in plain clothes.