CAMP LESTER, Okinawa — Lt. Toshihiro F. Estrada, 42, head of Human Resources and Operations for the U.S. Naval Hospital Okinawa, died unexpectedly of natural causes Tuesday, the hospital announced.

Estrada, of San Diego, was also president of the Medical Service Corps Association of Okinawa.

A memorial service is scheduled for 10 a.m. June 1 at the Lester Chapel.

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