Testing of the malaria drug hydroxychloroquine as a possible treatment for coronavirus has been halted because of safety fears, the World Health Organization (WHO) says.
Trials in several countries are being "temporarily" suspended as a precaution, reports BBC.
It comes after a recent medical study suggested the drug could increase the risk of patients dying from Covid-19.
US President Donald Trump has promoted the anti-malarial drug, despite warnings from public health officials that it could cause heart problems in Covid-19 patients.
Trump also said he was taking the drug himself to ward off the virus.