A 16-year-old boy says he was bitten by a shark while swimming at Cape Henlopen State Park in Lewes, Delaware.
State officials said the reported shark bite led them to delay Tuesday's opening of swimming areas at the park.
Officials with the state Division of Parks and Recreation say the boy was injured Monday afternoon and was treated at a hospital for gashes to his left forearm.
The boy told authorities that he was standing in about five feet of water when he felt something grab his arm. He reported that the shark released its bite and swam away after he batted it with his right arm.
Lifeguards on duty treated the teen's cuts before he was transported to the hospital for further medical attention.
Lifeguards and biologists were scheduled to monitor the waters Tuesday morning before opening them up for swimming.