Authorities in the south-western Russian region of Voronezh declared an emergency on Saturday following a Ukrainian drone attack and explosions in the Ostrogozhsk district. Voronezh governor Aleksandr Gusev reported on Telegram that several settlements in the Ostrogozhsk district had been evacuated following detonations caused by an object with explosive materials. Gusev did not identify the object, but Ukrainian observers assumed that an ammunition dump had been hit. According to Gusev, there were no casualties and the extent of the damage was not clear. Most of the residents had found accomm…