Four staff members working in the office of Kenya's President Uhuru Kenyatta have tested positive for coronavirus, a statement from the presidency says.

All four have been referred to a nearby hospital for treatment, it adds.

The president and his family are "safe and free from Covid-19", the statement says.

All staff, including the president and his family, are tested on a regular basis.

But to ensure that the spread is contained there will now be "extra access protocols" for those staff members who live outside the statehouse.

Kenya currently has more than 3,000 confirmed cases of the virus and more than 80 people have died after catching Covid-19.