MONROVIA, Safar 21, 1437, Dec 3, 2015, SPA -- Liberia released its last two known Ebola cases from hospital on Thursday as it starts a new countdown to declaring itself free of the virus for a third time, health officials said, Reuters reported. Liberia had been the only country in West Africa with known cases. Neighbour Sierra Leone was declared Ebola-free in November while Guinea's last known case recovered two weeks ago. The two patients released from the Paynesville ETU are the father and younger brother of the presumed index case, a 15-year-old boy named Nathan Gbotoe from a suburb of the capital Monrovia who died from the disease last week. -- SPA 23:15 LOCAL TIME 20:15 GMT www.spa.gov.sa/w