A 55-year-old woman smashed another woman in the head with a glass sugar dispenser at a coffee shop after the victim tried to stop the suspect from stealing a cup of coffee, police said Tuesday.

The incident occurred just before 10 a.m. Monday at a coffee shop in the unit block of California Street, according to police.

The suspect apparently tried to take a cup of coffee from the shop without paying, but the 29-year-old victim recognized her from previous incidents and intervened. That’s when the suspect grabbed the sugar dispenser and struck the victim on the head.

The victim suffered a contusion to the head and was taken to a local hospital. Police arrested the suspect without incident.