Overnight, explosions were heard in Russia's Ufa. Locals reported a drone attack and a fire at the local refinery. Russia's Emergencies Ministry later said they had allegedly managed to put out the fire. Authorities claim that the fire broke out on the territory of the plant in the area of the incinerator.

A fire doused on Monday after burning for hours overnight was sparked by technical issues at the Ufimsky oil refinery in the Russian city of Ufa, authorities said on Monday, but gave no further details.

A fire that broke out on Monday at the Ufimsky oil refinery, one of Russia's largest, was due to technical issues and has been extinguished, Russia's emergency ministry said, adding that the refinery had continued operations.

(Reuters) -Firefighters doused a blaze that raged for hours at the Ufimsky oil refinery in the Russian city of Ufa, authorities said on Monday, but gave no details of possible casulties and the cause was not immediately clear.