Los Angeles Police Department Chief Michel Moore was hospitalized late Monday after he said he was not feeling well, the Department said in a statement.
Moore was admitted to USC Medical Center for observation. He was released Tuesday night.
"Chief Moore is in great spirits and appreciates your well-wishes and support," Moore's chief of staff wrote in a bulletin to LAPD employees.
Moore was unexpectedly absent from Tuesday morning's Police Commission meeting but a reason was not disclosed.
Multiple law enforcement sources told NBCLA that Moore began showing symptoms of an unknown problem during a meeting Monday and a decision was made to drive the Chief to the hospital.