Another man walked up and stabbed the victim in the leg as he slept inthe 2900 block of India Street around 9:25 p.m. Friday, said San Diego police Officer David Stafford.
The homeless man was taken to a hospital for treatment of a non-life-threatening injury, he said.
The suspect is described as black, 5 feet 9 inches tall, with a thin build. He was wearing a black hoodie, Stafford said.
Anyone with information is asked to contact San Diego Police at (619) 531-2204.