A 48-year-old man who had a history of medical problems died Saturday at the Arlington County jail, authorities said.

Neither the man’s name nor the nature of his health problems were disclosed.

The Arlington County Sheriff’s office said he was found unconscious in a medical unit cell at the county’s detention facility. Officials said deputies and nurses at the jail immediately tried resuscitation efforts until rescue personnel arrived and transported the man to an area hospital, where he was later pronounced dead.

Sheriff authorities said the man was convicted last year of assault and battery of a family member and was sentenced to five years. His family was told of his death Saturday, officials said.

An autopsy is expected to be performed and the Arlington County Police department will investigate.