NEW : The victim was scuba diving with friends at the time of the incident . Note : `` He was in the water by himself , I believe , '' Sgt . We believe a great white shark inflicted ` ` massive injuries '' The incident occurred near Rottnest Island in Western Australia .
NEW : The victim was scuba diving with friends at the time of the incident . Note : We believe a great white shark inflicted ` ` massive injuries '' The incident occurred near Rottnest Island in Western Australia .