The man is suspected of spying on Romanian or NATO military positions located in the vicinity of the city of Tulcea, it continued.
German President Frank-Walter Steinmeier will begin a three-day visit to Romania on Wednesday.
Leading the park is London, positioned as the city with the world’s highest congestion.
NATO promised more arms and equipment for Ukraine to help restore power supplies cut by Russian strikes.
Romanian police said on Wednesday a man was killed after crashing his car into a fence outside Russia’s embassy in Bucharest.
The embassy directed fleeing Nigerians to contact embassy personnel stationed at the country’s four entry points with their valid travel documents.
