German shipbuilder Lürssen, which makes military vessels as well as luxury yachts, was the target of a ransomware cyberattack over the Easter weekend, Bloomberg reports.

“In coordination with internal and external experts, we immediately initiated all necessary protective measures and informed the responsible authorities,” company spokesman Oliver Grün said on Tuesday. 

The attack brought large parts of Bremen-based Lürssen’s shipyard operations to a standstill, according to local news outlet Buten un Binnen which reported the incident earlier.

Among the superyachts that Lürssen has built is the world’s largest by volume, the 156-metre Dilbar, owned by a trust linked to Russian billionaire Alisher Usmanov. The company will celebrate its 150th birthday in 2025.

In February Lürssen Yachts announced the launch of Project 1601, a 90-metre displacement Motor Yacht . The exterior design is by Monaco based studio Espen Oeino International, while the Interior design was created by Dölker & Voges Design from Hamburg.

PHOTO: Project 1601 Lürssen Yachts