Washington (CNN) Two US sailors based at Naval Submarine Base Kings Bay in Georgia have died of apparent drug overdoses in the last week, according to a US Navy public affairs officer.

Petty Officer First Class Brian Jerrell, a sailor assigned to the Trident Training Facility, was found dead of an apparent drug overdose in his off base residence on October 12, Navy Cmdr. Sarah Self-Kyler said.

Four days later, Jerrell's roommate, Petty Officer Second Class Ty Bell, a sailor assigned to the Ohio-class ballistic missile submarine USS Wyoming was found dead of an apparent overdose as well, according to Self-Kyler.

A Navy official said the overdoses were a result of cocaine, but cautioned there is a toxicology report pending.

Kingsland Police Department is investigating the incident, with support by the United States Naval Criminal Investigative Service.

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