Ukraine will be able to conduct more attacks on Russian ships, a Ukrainian minister who has played a key role in building the country’s drone industry told Reuters after a recent series of sea raids.

“There will be more drones, more attacks, and fewer Russian ships. That’s for sure,” Mykhailo Fedorov, the digital transformation minister, said in an interview on Friday.

Ukraine has made several attacks in September using sea drones and missiles on Russia’s Black Sea fleet in and around the Crimean peninsula.