A Ukrainian sea drone attack on Russia’s Crimean bridge in July had “overturned” naval operations and forced Moscow to resort to ferries to move weaponry, the head of Ukraine’s main intelligence agency said in a video broadcast on Friday, Report informs, citing Reuters.

Vasyl Maliuk, head of the Security Service of Ukraine (SBU), said the second of two major attacks in August had seriously disrupted operations on the 19-km (12-mile) bridge, Europe’s longest, and dented the notion of Russian invincibility.

“We have practically overturned the philosophy of naval operations,” Maliuk said in the first of a series of televised documentaries entitled “SBU, the Special Operations of Victory.”

“We have destroyed the myth of Russian invincibility. The country is fake. The bridge is doomed. Plenty of surprises lie ahead, not just the Crimean Bridge.”