A 61-year-old surfer in Hawaii had his leg severed when he was bitten in a shark attack in the waters off Maui on Friday morning, authorities said.The man, whose name was not released publicly, was surfing around 7:05 a.m. at a surf spot known as "Sand Piles" near Waiehu Beach Park when the shark attacked him, Maui County said in a news release."First responders confirmed the victim’s leg was completely severed just below the knee," officials said.The surfer was sitting on his board in the water when the shark suddenly swam up and bit his leg, HawaiiNewsNow reported, citing sources.FLORIDA TEEN