New Delhi, May 31 -- A Russian drone that was part of an attack on Ukraine went astray and struck an apartment building in eastern Romania, injuring two people in the NATO member country, Romanian officials said Friday. The incursion added to concerns that the war could spread across the alliance's borders.

The drone was tracked overnight by radar in Romanian airspace, crashed onto the roof of the building in the Danube port city of Galati and sparked a fire, the Defense Ministry said in a statement. The two injuries were minor and several people were evacuated.

It was the latest in a series of drones - from both Russia and Ukraine - to hit a NATO member since Moscow launched its full-scale invasion in February 2022.

Romania asked NATO...