The blast was so powerful that the huge disc-shaped lid of an oil storage tank was launched into the sky over Moscow like a frisbee.

Evading Russian air defenses, Ukrainian drones struck an oil refinery in southeast Moscow on Thursday for the second time in three days, igniting a fierce blaze that spewed out ?clouds of black smoke.

The attacks are part of a wider Ukrainian campaign to cripple the oil industry whose revenues finance Russia¡¯s ?war effort.