The transatlantic NATO alliance said on Thursday that there was no indication that Russian drone debris found in Romania was evidence of an intentional attack on NATO territory, but it pointed to "irresponsible and potentially dangerous" actions.

"While NATO has no information indicating any intentional attack by Russia against Allied territory, these acts are irresponsible and potentially dangerous," a spokesperson said in a statement. 

The spokesperson added that NATO had increased its presence in the Black Sea region in recent days.

Earlier on Thursday, the Romanian defense ministry confirmed that fragments from a Russian Geran 1/2 drone were found in NATO-member Romania around a village near the Danube and the border with Ukraine.

There was no immediate comment from Russian authorities. 

(With input from Reuters)