Romania says a Russian drone has breached its airspace - the second NATO country to report such an incursion.
Romanian fighter jets were in the air monitoring a Russian attack in Ukraine on Saturday and were able to track the drone near Ukraine's southern border, the defence ministry said in a statement.
Ukrainian President Volodymyr Zelensky said the incursion could not be a mistake - it was 'an obvious expansion of the war by Russia'. Moscow has not commented on the Romanian claims.
On Wednesday, Poland said it had shot down at least three Russian drones which had entered its airspace.
In its statement, Romania's defence ministry said it detected the Russian drone when two F-16 jets were monitoring the country's border with Ukraine, after 'Russian air attacks on Ukrainian infrastructure on the Danube'.
The drone was detected 20km (12.4 miles) south-west of the village of Chilia Veche, before disappearing from radar, posing no immediate threat to populated areas, the ministry stated.
Poland also responded to concerns over Russian drones on Saturday with Prime Minister Donald Tusk stating, 'Preventative operations of aviation - Polish and allied - have begun in our airspace.'
Earlier this week, Russia's defence ministry claimed there were 'no plans' to target facilities on Polish soil.
Belarus, a close ally of Russia, suggested the drones which entered Polish airspace were a result of navigation system issues.
The Czech Republic has since dispatched a special operations helicopter unit to Poland as part of NATO's enhanced defense posture.
In response to the latest drone incursion, President Zelensky pointed out that the Russian military 'knows exactly where their drones are headed and how long they can operate in the air', urging Western countries to impose stricter sanctions on Russia.
This surge in aggression follows Russia's full-scale invasion of Ukraine initiated in February 2022, with increased combat activity noted since President Vladimir Putin met with U.S. President Trump in Alaska last month.
