From BBC's rolling coverage
'Iran's Supreme Leader has rejected America's offer of aid to help the country with its battle against coronavirus.
In a televised speech, Ayatollah Ali Khamenei said the US was Iran's "most evil enemy" and hinted at a conspiracy theory, also voiced by some Chinese officials, that America was responsible for the pandemic.
“I do not know how real this accusation is but when it exists, who in their right mind would trust you to bring them medication?" Mr Khamenei said. "Possibly your medicine is a way to spread the virus more.”
Without offering any evidence, he also alleged that the virus “is specifically built for Iran using the genetic data of Iranians which they have obtained through different means”.'