Two special agents of the Federal Bureau of Investigation (FBI) were killed during a hostage rescue training exercise off the coast of Virginia Beach.
Christopher Lorek, 41, and Stephen Shaw, 40, were assigned to the FBI's Critical Incident Response Group, CNN reported.
The FBI said the cause of the incident was under review.
"We mourn the loss of two brave and courageous men," FBI Director Robert S. Mueller was quoted as saying in a statement Sunday.
Lorek joined the FBI in 1996. He is survived by his wife and two daughters. Shaw joined the FBI in 2005 and is survived by his wife, a daughter and a son.
The hostage rescue team is part of the tactical support branch of the FBI's Critical Incident Response Group. It is based at the FBI Academy in Quantico, Virginia.
