SOUTH WHITTIER — Police Thursday asked the public’s help in tracking down a missing 70-year-old man who suffers from schizophrenia and bipolar disorder.

Donald Doyle was last seen Monday at his home in the 13000 block of South Crewe Street, in the unincorporated county area of South Whittier, Los Angeles County sheriff’s officials said in a written statement.

He’s described as white, 5 feet 9 inches tall, 209 pounds, with brown hair and blue eyes, officials said. He’s missing most of his death.

It was not known what clothing he was last wearing, however Doyle usually wears a baseball cap, investigators said.

Anyone who sees Doyle is asked to contact their local police agency immediately, or detectives Carns or Abraham at the the Sheriff’s Missing Persons Unit at 323-890-5500.

PHOTO of Donald Doyle courtesy of the Los Angeles County Sheriff’s Department