Update: Good news, authorities have located Peh Hsiung and he's safe and sound.
Authorities are asking for your help in locating 101-year-old Peh Hsiung who has been missing since yesterday morning.
Officer Albie Esparza says Hsiung was last seen at his residence on the 400 block of 15th Avenue in San Francisco's Richmond District. He was is considered "at risk" due his age and high blood pressure.
Police say he was last seen wearing a blue jacket and green "Hawaii" hat. He is known to frequent Chinatown and has limited English language skills.
If you find Hsiung please contact SFPD at (415) 553-1071.