Five Italian tourists died during a deep scuba dive in the Maldives' Vaavu Atoll, prompting an investigation into possible causes such as oxygen toxicity and underwater panic. The group, including a marine biology professor and a certified dive instructor, descended to around 160 feet, far beyond the 100-foot recreational limit. Experts suggest that high oxygen levels at depth could have led to seizures or disorientation, while confined cave conditions may have amplified panic and reduced visibility. The tragedy is being called the worst single diving incident in Maldivian history.