87-YO San Leandro man with Alzheimer's missing

Police say an 87-year-old San Leandro resident with Alzheimer's has been missing since about 11:30 a.m. Tuesday. 

Dong Chen speaks Cantonese, walks with a cane and was last seen in the downtown area of San Leandro, where he lives. He's about 5'8" with a slim build. 

He was last seen wearing a dark-gray zip-up jacket, black pants and black shoes. 

Police say Mr. Chen does not drive or use public transportation, but they have been in contact with BART and ASCO Transit. 

You should contact authorities if you see this man.