Oil drops to below US$66, lowest since May, on demand concerns

LONDON (Reuters) - Oil dropped to below US$66 a barrel on Thursday, its lowest since May, pressured by concerns about weaker demand as COVID-19 cases rise, a stronger U.S. dollar and a surprise increase in U.S. gasoline inventories.

Circulation of the Delta variant in areas of low vaccination is driving transmission of COVID-19, the World Health Organization said. Coronavirus-related deaths have spiked in the United States over the past month.