A local expert who has dived in caves in the Maldives 'countless times' has described the terrifying final moments a group of five divers may have endured - and dubbed the tragedy an accident waiting to happen. Alarm bells were raised on Thursday after five Italians, including a mother and daughter, failed to resurface after attempting to explore the caves at a depth of around 165ft (50m). The body of the local instructor who led the group, Gianluca Benedetti, was discovered within the passageway from the mouth of the Thinwana Kandu cave, also known as Shark Cave, on Friday, at a depth of around 197ft (60m).The rest of the group was found on Monday by the team of three Finnish divers trapped at the end of the tunnel, deep at the bottom of the cave's furthest chamber, which is in complete darkness.This now marks one of the worst single diving accidents in the history of the Indian Ocean nation. 'I have visited those caves countless times. There is no current. They swam into that third cave. They chose to go in there,' Shafraz Naeem, a former military diver for the Maldives National Defence Force, told the Daily Mail.'One possibility is the instructor intentionally swam away from the group. Maybe he was running out of air. The rest of the group died in that third chamber and Benedetti died in the passageway trying to get out.'The cave is divided into three separate parts, connected by narrow passageways, which sharks, stingrays and lobsters inhabit. Mr Naeem, despite being an expert diver, has intentionally never entered the third section due to safety concerns. Shafraz Naeem, a former military diver for the Maldives National Defence Force, pictured in the Thinwana Kandu cave Mr Naeem, 50, has visited the cave 'countless times' but has never entered the third chamber, where four of the five members of the group were found