Romania on Sunday strongly condemned the entry of a Russian drone into its airspace during an attack on neighbouring Ukraine, with the foreign ministry summoning Moscow's ambassador over the incident.

Axar.az reports, citing France 24, earlier on Sunday, NATO member Romania had said that Moscow's actions pose a "new challenge" to Black Sea security.

The drone did not fly over populated areas and did not pose an imminent threat to the safety of the population, the defence ministry said in a statement.

The incursion comes days after fellow NATO member Poland said it had shot down Russian drones which had violated its airspace as Moscow launched a barrage against Ukraine.

Foreign Minister Oana Toiu also announced that Russia's ambassador to Bucharest, Vladimir Lipaev, would be summoned over Saturday's drone incident to the ministry.