Monrovia, Dhu-AlHijjah 5, 1435, Sep 29, 2014, SPA -- Liberia's chief medical officer placed herself and her staff under quarantine after her special assistant died of Ebola, dpa qouted the government as saying on Monday. Bernice Dahn and her staff members were quarantined as a "display of self-discipline and medical efficiency," said Information Minister Isaac Jackson. Dahn was not showing symptoms of Ebola, he said. Dahn's assistant, Napoleon Brathwaite, died on Thursday from the virus. Liberia is the country hardest hit by the Ebola outbreak that has killed more than 3,000 people in West Africa. -- SPA 18:23 LOCAL TIME 15:23 GMT www.spa.gov.sa/w