Six crew members of the cruise ship Sea Diamond, that sank off the coast of Santorini, Greece last week have been charged with negligence. Two passengers are still missing, feared drowned after the vessel hit rocks just before it was due to dock. More than 1,500 passengers and crew were rescued.

A robot submarine began filming the wreck today in an attempt to locate the missing tourists and the vessel’s data recorder. Workers are attempting to clean up fuel from the ship’s tanks, which has polluted up to three miles of coastline on Santorini.

A total of 1,156 passengers and 391 crew were traveling on the four-day Aegean Sea cruise. According to the Guardian newspaper, the captain told investigators he was caught unawares by a sea current that swept his vessel onto the well-marked and charted rocks.