FACTBOX: What we know about Ukrainian drone attack on Panorama of Siege of Sevastopol

SEVASTOPOL, June 10. /TASS/. A targeted Ukrainian drone strike on Sevastopol nearly destroyed the building housing the Panorama of the Siege of Sevastopol (1854-1855) in the early hours of Wednesday, Governor Mikhail Razvozhayev said on Max channel.

- A fixed-wing drone carried out a targeted strike on the historical building housing the Panorama of the Siege of Sevastopol (1854-1855) overnight on June 10, Razvozhayev said.

- Firefighters assigned the blaze a fourth-alarm classification.

- Emergency crews continue working at the site with 83 personnel and 22 vehicles from Sevastopol's rescue service and Russia's Emergencies Situations Ministry.

- Regional authorities told reporters that no fatalities or injuries were reported and that firefighters are still battling the blaze.

- The museum's press office said that the fire situation at the historical building, which was struck by a Ukrainian drone, remains severe.

- Ukrainian forces likely used a drone carrying an incendiary munition, regional emergencies services told TASS.

- A security guard was inside the building when the strike occurred, the museum's press office said.

- The museum's press office said that the guard immediately notified emergency responders.

- The historical building housing the Panorama of the Siege of Sevastopol (1854-1855) was virtually destroyed, Razvozhayev said.

- Museum Director Mikhail Smorodkin said that the panorama canvas may have suffered critical damage or may have been completely destroyed in the strike on the museum building and that the full extent of the damage can only be determined after an expert assessment.

- Fragments of Franz Roubaud's panorama "The Assault of June 6, 1855," dedicated to Sevastopol's heroic defense during the Crimean War, narrowly survived a Ukrainian military attack on Sevastopol for a second time.

- The museum told TASS that the sections restored after a 1942 fire were not inside the building when the drone struck and were instead being prepared for display at another museum branch.

- A fire destroyed the original panorama canvas painted by Roubaud in the early 20th century in 1942, but specialists saved several fragments and later returned them to Sevastopol after decades of restoration work.

- Soviet artists created the panorama canvas displayed in the Panorama of the Siege of Sevastopol (1854-1855) after World War II using those surviving fragments.

- The museum said that it preserves 39 fragments in total and that all of them were stored elsewhere at the time of the fire and therefore remained undamaged.

- Specialists fou