The World Health Organization (WHO) reported a suspected outbreak of Marburg Virus Disease (MVD) in the Kagera region of northwestern Tanzania, with nine people reportedly infected, of whom eight have died.

A case of the bleeding virus Marburg has been confirmed in Tanzania, a week after authorities denied there was an outbreak. The deadly illness similar to Ebola is highly infectious, and can kill up to 88% of people without treatment.

Tanzania’s president said Monday that one sample from a remote part of northern Tanzania tested positive for Marburg disease, a highly infectious virus which can be fatal in up to 88% of cases without treatment.