The city of Moscow has suddenly doubled its coronavirus death toll from last month. Media reports and analysts have questioned the accuracy of Russia’s mortality figures for the virus. Under its initial methodology, Moscow’s Health Department had attributed 636 deaths to COVID-19. But on Thursday, the department announced that 1,561 deaths in April could be linked to COVID-19. It attributed the revision to an alternative counting method that takes into account “debatable cases.” The department said the newly counted deaths include 756 coronavirus patients who tested positive but who died of other causes and 169 people who tested negative but were still suspected to have the virus.