The health ministry in Uganda says three more Ebola patients have died bringing the total number to four since an outbreak was declared earlier this week.

Eleven cases have been confirmed.

Seven other deaths are being investigated to see if they're linked to the outbreak in Mubende west of the capital Kampala.

The World Health Organization says the Ebola Sudan strain which is present in Uganda is less transmissible and has shown a lower fatality rate in previous outbreaks of a different strain, Ebola Zaire.

It killed nearly more than 2,000 people in the neighbouring Democratic Republic of Congo between 2018 and 2020.