As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION - DURING CRUISE AN ALARM WAS HEARD COMING FROM THE UPPER CARGO COMPARTMENT. NO COCKPIT INDICATIONS. CREW CONFIRMED IT WAS NOT THE CABIN ALERT WARNING HORN. ALARM SOUNDED SIMILAR TO A SMOKE ALARM. A/C DIVERTED TO KIX. PERFORMED CARGO SMOKE TEST. OK PER MM 26-15-00. NO LAST REG FAULT AND NO CFDS FAULT NOTED. ALL CARGO INSPECTED BY KIX OPS.