A nighttime Russian missile strike on Odesa killed at least four people including a 16-year-old girl, regional authorities said Friday, in the latest in a series of attacks this week on the southern Ukrainian region that are likely intended to disrupt the country’s grain exports.

Four people were killed by a Russian missile strike in Ukraine's southern Odesa region on Friday, Governor Oleh Kiper said on the Telegram messaging app. Kiper said a ballistic missile struck a two-storey building where civilians lived and worked.

Ukraine is reducing Russia's ammo advantage on the battlefield via attacks on depots on Russian soil, but the total impact is up for debate.

Up to 400 Iran-made drones may have been destroyed in the fiery blast, while a military airbase in Southern Russia was also attacked.

Ukraine has also made extensive use of drones during the war, including to attack military targets and energy installations on Russian territory. One such strike last month triggered an earthquake-sized blast at a major weapons arsenal in Russia's Tver region, west of Moscow.

Russia unleashed a deadly missile and drone assault against civilian and infrastructure targets across Ukraine, killing 9 people and injuring dozens as President Volodymyr Zelensky was away canvassing support in Europe.