He was found late Saturday night, a block from Lake Merritt at Grand Avenue and Perkins Street.
Due to the seriousness of the injury, the homicide division was called in to investigate. The man was found on Perkins Street in front of a corner grocery store at around 10 p.m.
When police found the man, he was unconscious and suffering from what appeared to be blunt force trauma to the head. Police say he had no identification on him, but they believe he is 35-years-old. He was taken to the hospital and is said to be in critical condition.
Neighbors are surprised to hear about this incident. This neighborhood, called Adams Point which is just north of Lake Merritt, is considered to be very safe.
Police want to know if the man's injuries were the result of him falling onto the pavement or if someone struck him in the head. Officers asked merchants if they had any video cameras mounted on the outside of their businesses.
Sylvia Komroski a store manager said police came into her store and asked if she had a video camera that showed the street, but she said no, her cameras only show the inside of the store.
"Apart from some vandalism, some cars broken into, that sort of thing, it's a safe place in Oakland, like many other neighborhoods in Oakland. So whenever I hear about that, whether it's in this neighborhood or any other, it's shocking, it's disturbing, it's really upsetting to me. I hope he's okay," said Oakland resident Britt Tennell.
Again, the man is in critical condition at the hospital.
Police are hoping for some tips from the public so they can determine what happened. If you have any information, Oakland police want you to call them.