A Saudi Arabian prisoner died of an apparent suicide at the Guantanamo Bay Naval Base Wednesday, the U.S. military said.
"The detainee was found unresponsive and not breathing in his cell by guards. The detainee was pronounced dead by a physician after all lifesaving measures had been exhausted," the U.S. Southern Command in Miami said in a statement.
The military did not indicate how the prisoner died.
He is the fourth detainee to die of apparent suicide at the detention camp, which opened in January 2002 and holds about 380 foreign terrorist suspects on the U.S. naval base in southeastern Cuba.
Three others hanged themselves in their cells last summer, deaths that are still under investigation by the Naval Criminal Investigative Service.
"The remains of the deceased detainee are being treated with the utmost respect. A cultural advisor is assisting the Joint Task Force to ensure that the remains are handled in a culturally sensitive and religiously appropriate manner," the Southern Command said.
It said the Naval Criminal Investigative Service had begun an investigation.
