Florida shark attack leaves man in critical condition

Swimmer off Fernandina beach was rescued by Nassau county marine unit after distress call from boat on Friday

A shark attack off Florida's Atlantic coast left a man with a severe bite to his right arm" on Friday, authorities say, leaving him in critical condition from blood loss.

The Nassau county sheriff's office marine unit, which was patrolling off the coast of Fernandina beach near the Florida-Georgia border, said it had received a distress call from a boat on Friday and had applied a tourniquet to stop the bleeding.