The World Health Organization says an outbreak of Marburg virus in Angola is not yet over, as the death toll continues to rise.

A WHO spokeswoman, Aphaluck Bhatiasevi, says there have been some recent cases that do not have a clear link to previous cases, a finding the U.N. agency is concerned about.

Angolan officials say 292 people have died from Marburg out of a total of 336 people identified as having been infected by the virus.

So far, all those infected are believed to have contracted the disease in northern Uige province.

The virus kills quickly, spreading through contact with bodily fluids such as blood, excrement, vomit and saliva.

Some information for this report provided by Reuters.