An unidentified man was found stabbed to death in an alley at 2nd and Bush streets Monday morning, police said.
Police spokeswoman Maureen Thomas said the man, who had been stabbed in the chest, was found by a sanitation worker about 6:45 a.m.
Thomas said investigators did not know when the man was killed and were trying to determine a motive. Police think he was a transient, she added.
Anyone with information is asked to call Santa Ana police at (714) 834-4801.