Ukraine has targeted two of Russia's oil refineries in drone strikes in an effort to bankrupt their ability to continue funding the war.

Officials say a Russian drone has blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack, killing at least four people and injuring nine others

Russian petrochemicals giant Sibur said it had temporarily suspended operations at its plant in Kstovo, in the Nizhny Novgorod region, on Wednesday morning (January 29) after debris from a Ukrainian drone sparked a fire overnight.