New fragments of a drone similar to those used by the Russian military were found on Romanian soil, the defence ministry said on Saturday, and President Klaus Iohannis said this indicated an unacceptable breach of Romania's air space had occurred.
Bucharest is analyzing the wreckage of a possibly Russian drone on its territory, while maintaining a cautious approach towards Moscow following recent incidents near its border. […]
If an attack were to occur on Romanian soil, the country’s army is prepared to respond accordingly, says the Ministry of Defense. Bucharest is ready to deal with any Russian drone or missile that strays into Romania, but is also wary of escalating tensions. Romania can also invoke Article 4 of the NATO Treaty, which calls for joint consultations among member states to safeguard political independence and territorial integrity and security.
There’s a good article on this issue in El Pais’s English language site:
Romania, the silent ally avoiding entanglement in Ukraine’s war