This week has witnessed more dangerous Ukraine war spillover aerial activity in Eastern Europe. In a fresh instance, Romania's defense ministry is reporting that two drones entered the country's airspace in less than 24 hours.The military said that radar systems had earlier picked up a drone "operating in the vicinity of the Ukrainian border" Saturday morning - after which F-16 fighter jets were scrambled and successfully shot it down.Source: Romanian Air ForceThe NATO member state's defense ministry continued by describing that two of the F-16s "safely shot down in an unpopulated area near the border."A very similar situation played out Friday over an unpopulated area near Padina, northeast of the capital, Bucharest. In that case a pari of Italian air force Eurofighter Typhoon jets were deployed and shot it down.Authorities did not immediately identify the drone's origin but that are pointing to the Russian military. Romanian Defense Minister Radu Miruta was cited in national media as saying "the impact site and the drone wreckage are currently being analyzed" but that "the pattern is consistent with previous confirmed flights by Russian drones."Early indicators say these were likely Shahed-type drones used by Russian forces; however, there have also been past instances of Ukrainian projectiles entering friendly neighboring countries' airspace.These types of breaches have been happening with increasingly regularity over the past couple years. In prior incidents, Ukrainian President Volodymyr Zelensky has accused Moscow of deliberately orchestrating provocations against NATO countries.He previously said on X during a past incident, for example, that "The Russian military knows exactly where their drones are headed and how long they can operate in the air. Their routes are always calculated."In prior recent instances of drones entering neighboring airspace, particularly in Baltic countries and also Poland, NATO jets were scrambled - and in some cases drones are safely brought down via electronic intercept means.But each instance creates new tensions between Russia and NATO, and the typical accusations and threats then fly. The Kremlin has of late been especially alarmed at the Trump administration transferring 5,000 US troops from Germany to Poland, near Russia's doorstep.