The blast happened at the port of Constanta at around 10.30am EEST (8.30am UK time). The surrounding area has been cordoned off with a huge pillar of smoke seen pouring into the sky. The Romanian Defence Ministry said the drone was thought to be "of the type used in the war in Ukraine", with Romanian media reporting that it was a Magura-type drone.

Dan confirmed Ukrainian forces lost control of the USV after it was affected by Russian electronic warfare measures. He called the drone’s entry onto Romanian sovereign territory “a direct consequence of the war Russia started against Ukraine.

A naval drone of a model used in the Russia-Ukraine war exploded near the Romanian port city of Constanta, Romanian authorities reported on June 5. The drone was spotted in the early morning hours and self-detonated at around 10:30 a.

A live television report from Romania's Black Sea port of Constanța was abruptly interrupted on 5 June after a maritime drone exploded nearby, heightening concerns over the regional impact of the war in Ukraine.

A marine drone used in the war in Ukraine exploded in the Romanian port of Constanta a week after another drone crashed into a building in another town in the NATO and EU member state.

By John Irish PARIS, June 3 (Reuters) - Romania's foreign minister said on Wednesday several allies were preparing to reinforce air defence capabilities along NATO’s eastern flank after a drone identified by Bucharest as Russian crashed into a residential building on its territory.

The Ukrainian Navy has said that one of its uncrewed surface vessels lost control under the influence of Russian electronic warfare systems while carrying out tasks in the Black Sea operational zone