As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE AFT LAV TRASH RECEPTICLE, FA EXTINGUISHED WITH COFFEE. - AIR TURNBACK TO MSP. MAINTENANCE INSPECTED AFT LAV TRASH BIN AND SURROUNDING AREA FOR SIGNS OF SMOKE OR BURN INDICATIONS, NONE NOTED. TRASH BIN FIRE BOTTLE STILL INTACKED FOUND AFT LAV TO BE SERVICABLE AT THIS TIME