"These are two deaths which are retrospective. They're from an earlier outbreak," WHO spokesman Glenn Thomas told reporters in Geneva, without providing further details.
Earlier today, the Saudi health ministry said four more cases of the SARS-like virus had been detected in the kingdom, bringing the number of cases there to 28 out of a global 38 cases.
While the virus has been deadliest in Saudi Arabia, where 15 people have died, cases have also been reported in Jordan, where two people have died; Germany, where one person has died; Britain, where two people have died; and France, where two patients are now in hospital in the northern city of Lille.