July 31 (Reuters) - A drone attack touched off a fire at an

energy facility and warehouses in Russia's Volgograd region on

Friday, injuring five, the regional governor, Andrei Bocharov,

said, but stopped short of giving details of the facility.

The region is home to a Lukoil-owned oil refinery.

Five people are seeking medical help after the attacks,

Bocharov added on Telegram.

In the neighbouring southern region of Rostov, a woman was

injured after a drone attack in the town of Gukovo, regional

governor Yuri Slyusar said on the messaging app.

Ukraine has recently stepped up attacks on Russian logistics

hubs, such as those of top online retailer Wildberries, as it

keeps up strikes on energy facilities that have triggered a

supply crisis across most of Russia.

Wildberries, with a few of its warehouses hit as recently as

Thursday, said on Telegram it had paid a second tranche of

financial support to nearly 100,000 sellers whose goods were

damaged.

Ukraine, with its own cities under constant Russian attack,

says its strikes deep inside the neighbour are "long-range

sanctions" designed to sap Moscow's war-fighting capacity and

force it to end the 4-1/2-year conflict.