Teen missing after double shark attack

A teenager has vanished after being attacked by two sharks off a popular beach in the southern Australian city of Adelaide, authorities said.

The 18-year-old man had fallen from a surfboard being towed by a power boat when the two sharks attacked off West Beach, South Australia state Sea Rescue Squadron spokesman Fraser Bell said.

Bell said there had been no sign of the man since, despite police and emergency services officers scouring the beach.

State Police Chief Inspector David Lusty said police were using boats to search the coastline but had found no trace of the victim. All Adelaide’s city beaches were shut after the apparent tragedy.

Bell said four friends from Adelaide had been out on the water for about 30 minutes when the sharks attacked. The three boys in the tow boat were aged 16.

The apparent tragedy would be the second shark fatality in Australian waters within a week.

A man was killed by a shark while spearing fish on the Great Barrier Reef off northeast Australia on Saturday.