Italian authorities have confirmed a request for additional security around the wreck of the luxury yacht Bayesian, which sank in August killing seven, including British tech entrepreneur Mike Lynch, after fears were raised that material in watertight safes onboard could be of interest to foreign governments.

Italian prosecutors fear that would-be thieves might try to reach the wreckage in order to loot expensive jewelry and other valuable objects onboard, including intelligence data, CNN reported, citing unnamed sources.

The concerns focus on hard drives that Lynch reportedly kept with him. Survivors reportedly told Italian prosecutors that Lynch “did not trust [internet] cloud services” and kept his data with him.