LAKANA(CNN) - Authorities are on the hunt for the man who violently attacked a 91-year-old widower with a large rock as he was visiting his wife's gravesite, police said.
The suspect "took property from the victim" and then fled on foot and later a bike, the Santa Clara Police Department said, calling the attack "unprovoked and ruthless."
The attack took place at the Mission City Memorial Park cemetery on the morning of September 14.
Police said they believe the attack was an isolated incident, but urged the public to report "any suspicious activity."
"Anyone with information regarding this crime, including any video capturing the streets surrounding Mission City Memorial Park... is asked to contact Detective Sergeant Nick Richards at (408) 615-4814 or anonymously at (408) 615-4TIP (4847)," the department said.