3 shark attacks off Sydney in just over 24 hours; man, boy in critical condition

Three shark attacks in 24 hours leave a man and a 12-year-old critically injured and another boy unharmed at Sydney beaches. Here’s what we know.

Man dies in shark attack at Sydney beach

A man in his 50s was killed by a large shark while surfing at a beach near Sydney, Australia on Saturday.

Largest shark ever tagged by research group spotted off Florida coast

Researchers are tracking what may be the largest male white shark ever tagged by OCEARCH, with recent signals coming from off Florida's east coast near Jacksonville.

Shark attack off Hawaii's Oahu island leaves woman seriously hurt

Also Friday, reported back-to-back shark attacks led authorities to temporarily close beaches to swimmers in Walton County, on the Florida Panhandle.

Shark bites leg off American tourist in Turks and Caicos: report

An American tourist has lost her leg after being bitten by a shark while vacationing in Turks and Caicos, police say.