Bombarding Przemysl"
It is a strange unpleasant feeling if the aeroplane appears above oneself high in the skies. You get the impression it tracks you personally although it is not able to distinguish individuals because of its height of 2,000 metres...", witnessed Richard Stenitzer, an Austrian army doctor trapped in the Russian siege of Przemysl (via historynet.com).
The identity of these Russian bombers is unknown. At war's outbreak the Imperial Russian Air Force had the largest number of aircraft on strength of the entire Entente, with several types in operation. Could they have been two Sikorsky Ilya Muromets? Two were available as of August 1914. The first designated bomber squadron was established on 23 December (its 100th anniversary was just celebrated in Russia as the 'Day of Long-Range Aviation'. However, it is recorded that Russia's first major bombing raid occurred in February, 1915, when the Austrian railway station in Willenberg was attacked. Can anyone confirm any the aircraft types involved?
(from the Evening Public Ledger, 5 January 1915):
Here's some historic footage of the bombardment of Przemysl in 1915:
https://youtu.be/Ly8wm-oas9I?si=Cv70zknhvSE_JtJ-