A Ukrainian drone attack overnight resulted in damage to a power line and sparked a fire at a railway station building in Russia's southern Volgograd region, according to local authorities.

The administration of the region reported that an unexploded drone fell on railway tracks near the Archeda train station.

While no damage to the tracks was confirmed, regional trains faced delays due to the incident.

The regional airport in Volgograd experienced temporary flight halts for several hours before resuming at approximately 0300 GMT.

Russian authorities cited a 'massive' attack targeting energy and transport infrastructure.

Ukraine has been known to conduct operations against key infrastructure within Russia in retaliation for its invasion of Ukraine, including facilities in the Volgograd region near the Ukrainian border.

The exact scale and nature of this particular incident remain under investigation.