Doctors amputated a leg of a teenage boy who was attacked by a shark while fishing in waist-deep water off Florida's Panhandle on Monday, two days after a 14-year-old girl died when a shark attacked her off another beach 80 miles away.

Craig Adam Hutto, 16, of Lebanon, Tenn., was fishing in the surf off Cape San Blas with his brother and a friend when the shark grabbed him in the right thigh, nearly severing the limb, said Capt. Bobby Plair of the Gulf County sheriff's office.

The leg was later amputated at Bay Medical Center in Panama City. Hutto was listed in critical condition but was expected to recover.

The Gulf County Board of County Commissioners issued a mandatory closure for beaches in the county until 11 a.m. Tuesday. There are no lifeguards on any of the county's beaches.

Cape San Blas is a narrow spit of land protruding into the Gulf of Mexico from Gulf County, about 80 miles southwest of Tallahassee. It is also about 80 miles east of the area where Jamie Marie Daigle of Gonzales, La., was killed by a shark Saturday. Erich Ritter of the Shark Attack Institute said the girl was probably attacked by a six-foot bull shark.

Florida averaged more than 30 shark attacks a year from 2000 to 2003, but there were only 12 attacks off the state's coast last year, according to the American Elasmobranch Society and the Florida Museum of Natural History.

Craig Adam Hutto, 16, critically injured in shark attack, is taken from a medical helicopter in Panama City, Fla. Doctors later amputated his leg.