Authorities in Sydney reopened several beaches Friday, a day after the first fatal shark attack in the area since 1963.

Baited lines and drones were being used to try to track and catch the shark involved in Wednesday’s attack. The beaches were allowed to reopen, Randwick City Mayor Dylan Parker said, when no sharks had been seen in the area.

Sydney Beaches Reopen After Shark Attack

The victim of the attack was identified as Simon Nellist, 35, a diving instructor. Nellist, who had served in the U.K. Royal Air Force, moved to Australia about six years ago, according to local news reports. He was a regular swimmer and a member of the local scuba diving club.

Sydney Beaches Reopen After Shark Attack

A video shared online showed a shark attacking a swimmer Wednesday off Little Bay Beach, about 20 kilometers south of Australia’s largest city, Sydney, near the entrance to Botany Bay.

Sydney Beaches Reopen After Shark Attack

Officials said they believed a great white shark at least 3 meters in length was responsible.

In addition to beach closures, an ocean swimming race scheduled for Sunday has been postponed following the attack.

Australia uses shark nets to reduce the chances of an attack, but they can't completely prevent one.