Caracas, Aug 14 : Dario Vivas, the Mayor of Venezuela's capital Caracas, has died after suffering from Covid-19 for more than three weeks. The senior member of the ruling socialist party died on Thursday. The 70-year-old announced on July 18 that he had tested positive for the virus and was undergoing treatment in isolation, reports Xinhua news agency. "I report that I have tested positive for ... COVID-19," Vivas said on Twitter at the time. Known to be a strong ally of President Nicolas Maduro, Vivas was appointed head of the Capital District in January. Vivas is the first top-level government official to die of Covid-19, although several others have tested positive, including Diosdado Cabello, the president of the National Constituent Assembly (ANC); Oil Minister Tareck El Aissami; and several governors and mayors of the South American nation. /IANS