The president, whose government has already drawn criticism for being secretive about the coronavirus outbreak and has previously asked Tanzanians to pray the coronavirus away, said he had instructed Tanzanian security forces to check the quality of the kits.

They had randomly obtained several non-human samples, including from a pawpaw, a goat and a sheep, but had assigned them human names and ages.

These samples were then submitted to Tanzania's laboratory to test for the coronavirus, with the lab technicians left deliberately unaware of their origins.

Samples from the pawpaw and the goat tested positive for COVID-19, the president said, adding this meant it was likely that some people were being tested positive when, in fact, they were not infected by the coronavirus.