One man died and eight other people were rescued after their boat went over a dam in the state of Maryland, US media reported.
The incident on Lake Linganore left four people desperately hanging onto the dam for their lives, NBC news said, citing Frederick County Fire and Rescue Services division captain Kevin Fox.
The four were rescued, along with three more who were pulled from the dam's spillway by a helicopter and another who was pulled out by boat.
Maryland Department of Natural Resources Police said the 62-year-old victim's body had been recovered after becoming trapped underwater by the force of the dam, according to NBC.
Fox told ABC News that residents heard people calling for help and reported the incident around 6:30pm (22:30 GMT).
The cause of the accident was unknown but occurred amid heavy flooding.
Lake Linganore is located around 45 miles (72 kilometers) northwest of Washington.