A Russian drone involved in an overnight attack on Ukraine went off course and crashed into an apartment building in eastern Romania, injuring two people and heightening concerns about the war spreading beyond Ukraine’s borders into NATO territory.

Romania’s Defense Ministry said the drone was detected and tracked by radar after entering Romanian airspace before crashing onto the roof of a residential building in the city of Galati, located on the Danube River near the borders with Ukraine and Moldova. The impact sparked a fire, leaving two people with minor injuries and forcing the evacuation of several residents.

The Romanian military scrambled two F-16 fighter jets and a helicopter authorized to engage aerial threats, while emergency alerts were issued to residents in affected areas. However, the aircraft did not engage or shoot down the drone.

Romania’s Foreign Ministry described the drone’s flight as a serious violation of international law and called on NATO to speed up the transfer of anti-drone capabilities to the country’s military.

Gen. Gheorghe Maxim, acting commander of Romania’s joint military staff, said the incident was not a deliberate Russian attack on Romania but warned that Russia remains a threat to regional security.

The incident was the latest in a series of drone incursions involving both Russia and Ukraine that have unsettled NATO member states. Ukraine’s air force said Russia launched 232 drones and one ballistic missile overnight, with 217 drones intercepted and strikes recorded in 14 areas.