Romania and its NATO allies have reacted angrily after a Russian drone crashed into an apartment building in eastern Romania, injuring two people, Aljazeera reported. 

The Ministry of Foreign Affairs in Bucharest on Friday labelled the crash of the drone, part of an overnight attack aimed at Ukraine, a serious violation of international law.

The incident is just the latest incursion along the alliance’s eastern flank, raising concern that the risk of an open confrontation between Russia and NATO states is rising.