SAN FRANCISCO—Over the weekend, two separate assault cases occurred in the city, both resulting in life-threatening brain injuries.

The first assault occurred on Friday, November 6, at the 3300 block on Mission Street inside a liquor store. The victim was a 42-year-old man, who got into an argument with another individual. The argument was over a lottery ticket, but specifics about the argument have not yet been disclosed to the public.

The argument led to the suspect punching the victim repeatedly in the head and then slamming the victim’s head against a shelf, resulting in a brain injury, a broken jaw and a broken nose. The victim was later transported to a local hospital after losing consciousness.

The suspect was identified as Abel Mancia Champas, 38, who was later arrested for suspicion of aggravated assault.

The second assault occurred on Sunday, November 8. The victim was a 53-year-old man who was crossing the road near Third Street and Quesada Avenue when he hit the ground. The victim suffered a life-threatening brain injury and some bruises to his arm. The victim apparently felt a sharp pain in the back of his head before collapsing on the ground.

Investigators are hoping to gain additional information from the second assault by reviewing security footage from the region. The second incident is still under investigation by authorities and no suspects have been arrested.