A 46-year-old inmate at the Maryland House of Correction in Jessup died early Sunday after authorities found him unresponsive in his cell and were unable to revive him, officials said.
A prison system spokesman said investigators are trying to determine the cause of death. The inmate was from Baltimore and was serving a life sentence for murder.
Spokesman George Gregory said there were no stab wounds or other obvious signs that the death was a homicide. The inmate was discovered about 5:40 a.m. after his cellmate called out to authorities that the man was unconscious, Gregory said.
Medical personnel performed cardiopulmonary resuscitation and later called for an ambulance crew from Anne Arundel County Medical Services, Gregory said. The man was pronounced dead at 8:20 a.m. at the prison.
Officials declined to identify the man, who had been in prison since 1997, pending notification of his relatives. State police have been called in to investigate and have questioned the man's cellmate, Gregory said.