Offshore contractor Saipem is investigating a crane accident aboard its Saipem 7000 vessel that is being used for installation work on some of Europe’s largest offshore wind projects.

The vessel was undergoing planned five-year crane load testing off Norway on 14 April when two cargo barges being lifted fell to the water, causing the ship to temporarily list. Nobody was hurt during the incident.

“Further to a preliminary assessment, it would appear that the main block wire broke during the test lifting operation,” Saipem said in a statement.