Ukraine has stepped up long-range drone attacks inside Russia, targeting oil refineries, fuel depots and other energy infrastructure in an effort to weaken Moscow's war economy and military logistics.

Russian officials say a recent strike in Nizhnekamsk killed and injured civilians. Moscow has launched a terrorism investigation.

Meanwhile, Russian attacks on Ukrainian cities including Kharkiv and Odesa continue to cause civilian casualties and damage.

The escalating exchanges highlight how the war is increasingly affecting people on both sides of the border.