"Regardless of whether it was on purpose or the result of ineptitude, Russia is still dangerous and we must defend ourselves against it," Sikorski said in a comment for the Reuters news agency.
European Commission President Ursula von der Leyen said Russia had "crossed yet another line" after one of its drones struck a densely populated area in NATO and European Union member Romania, injuring civilians during an overnight attack on neighbouring Ukraine.
“We stand in full solidarity with Romania and its people," von der Leyen said in a post on X.
"As we continue strengthening our security and deterrence, especially on our eastern border, we will keep increasing the pressure on Russia," she added.
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Source: Reuters, TVP Info, IAR, PAP