Ukrainian sea drone detonates at Constanta port

On the morning of June 5, 2026, a Ukrainian Magura V5 unmanned surface vessel lost navigation control during a Black Sea operation and entered Romania's Port of Constanta - a NATO member state. The vessel became lodged in an anti-pollution barrier near berths 77–78. Romanian authorities evacuated over 1,300 people from nearby beaches, sealed the port area, and deployed two military helicopters before the drone self-detonated at approximately 10:30 local time (07:30 UTC). No injuries were reported and no structural damage to port infrastructure was documented.

It was the second incident in a week in which weapons from the Ukraine-Russia conflict caused damage or emergency evacuation in Romania, following a Russian aerial drone that struck an apartment building in Galati on May 29, 2026 - documented in the Galati drone impact page.

The Magura V5 self-detonated at pier 77–78 after lodging in an anti-pollution barrier

The Magura V5 is a Ukrainian maritime strike drone developed for Ukraine's military intelligence directorate (HUR). It reaches a maximum speed of 78 km/h, has a range of up to 800 km, and can carry a payload of up to 320 kg of explosives. It is designed as a one-way strike vessel for use against Russian Black Sea Fleet targets.

After losing navigation control, the drone drifted into the port and became stuck in an anti-pollution barrier near berths 77–78 - hundreds of meters from the oil terminal and close to the headquarters of the Romanian Agency for Saving Human Life at Sea. The Romanian Intelligence Service (SRI), coast guard, and Ministry of Defence secured and isolated the area. The Magura V5 then activated its self-destruct mechanism at approximately 10:30 local time. No structural damage to port infrastructure was reported.

Romanian authorities received mobile phone emergency alert messages. Over 1,300 people were evacuated from Black Sea beaches in and around Constanta, and routes to the beaches were temporarily blocked.

Three other Ukrainian maritime drones were lost the same day

Romanian authorities confirmed that Ukraine lost control of four maritime drones in total on June 5, 2026. A second Magura V5 self-detonated offshore near Constanta under Romanian Coast Guard supervision. Two more detonated approximately 145 km east of Constanta in the Black Sea. The scale of the loss on a single day is consistent with a large Ukrainian naval operation in the Black Sea.

Ukraine's Navy attributed the loss of control to Russian EW jamming

Ukraine's Navy stated that the drone "came under the influence of the enemy's electronic warfare systems, lost control, and ended up near the coast of Romania." Ukraine's Ministry of Foreign Affairs spokesman Georgii Tykhyi confirmed that Kyiv had alerted Romanian authorities promptly after detecting the loss of control, enabling coordination before the detonation. No specific technical details were disclosed publicly about the type of interference - whether GPS spoofing, radio frequency jamming, or another method.

Ukraine has stated on multiple occasions that Russia deliberately uses electronic warfare to divert Ukrainian weapons into NATO territory, with the goal of straining the relationship between Kyiv and its Western allies. The same Russian EW pattern was cited in the Kouvola, Auvere, and Krāslava aerial drone incidents of March 2026, which are documented in AirVeto's 2026 Baltic cluster pages.

No formal Ukrainian apology to Romania was documented for this incident, in contrast to Ukraine's earlier apologies to Finland and the Baltic states for the March 2026 aerial drone incursions.

Romania held Russia responsible and did not condemn Ukraine

Romanian President Nicusor Dan stated: "The entry of this drone into Romanian sovereign space is a direct consequence of the war waged by Russia against Ukraine." Romanian Defence Minister Radu Miruta said Ukraine's advance warning had "allowed a timely evacuation." Romania's official framing placed responsibility on Russia as the aggressor and the source of the EW disruption; no condemnation of Ukraine was issued.

The Russian Embassy in Romania attributed responsibility to Ukraine as the drone's operator. Romanian officials did not accept this framing.

This incident followed a Russian drone strike on Galati one week earlier

On May 29, 2026, a Russian Shahed-type aerial drone targeting Ukraine veered off course and struck an apartment building in Galati, a Danube port city in eastern Romania, injuring two people. That was the first confirmed case of a Russian weapon directly hitting Romanian territory in the current conflict. The Constanta incident on 5 June followed seven days later. Together, the two events established Romania as a significant node in the Black Sea spillover geography.

• Galati drone impact, May 29, 2026 - Romania
• Kouvola drone crash, March 29, 2026 - Finland Chaika

This reconstruction draws on reporting by Euronews, the Kyiv Independent, The Maritime Executive, the Washington Post, and Al Jazeera, and on AirVeto's wind-model data for the June 5, 2026 event window. The wind layer shows atmospheric conditions over the Black Sea and Constanta coast for the event window. Methodology: methodology page.