India, July 10 -- Ukrainian drones on Thursday hit more Russian oil facilities and set two oil tankers ablaze in the Sea of Azov, a day after US President Donald Trump pledged to grant Ukraine a license to manufacture the Patriot air defence systems.

Ukraine's strikes on oil refineries and other infrastructure across Russia has triggered a widespread fuel crisis, with gasoline shortages and fuel rationing reported in multiple regions and drivers waiting for hours to fill their tanks.

Early on Thursday, a Ukrainian drone strike triggered a fire at an oil depot in the city of Tver in western Russia, according to acting regional Gov Vitaly Korolyov.

And in the southern Stavropol region, Gov Vladimir Vladimirov said oil reservoir has been ...