South Sudan has postponed the launch of its Covid-19 vaccination campaign, but did not offer a specific reason for the delay.

The vaccination programme was supposed to start on Monday in the capital Juba as announced last week by the health ministry.

Government official John Romunu said the vaccination exercise was postponed "for simple logistical reasons".

He said they are yet to receive information on when the vaccinations will take place.

South Sudan received its first batch of 132,000 doses of the vaccine on 26 March.