Three swimmers, including two teenagers, were attacked by sharks in separate incidents at Walton County beaches on Friday, authorities say.

A 45-year-old woman was bitten by a shark around 1:20 p.m. at Watersound Beach while swimming past a sandbar. She suffered significant midsection trauma, and part of her left arm was amputated. She is in critical condition at HCA Fort Walton-Destin Hospital, according to South Walton Fire District Chief Ryan Crawford.

About 90 minutes later, near Seacrest Beach, a 15-year-old girl and a 17-year-old girl were injured by a shark in waist-deep water. One girl sustained significant injuries and was airlifted to Ascension Sacred Heart Pensacola Hospital in critical condition, Crawford said.

Grayson Everett is the state and political editor for Yellowhammer News. You can follow him on Twitter @Grayson270