Robbery at a jewelry store in California

At noon on May 22, local time, a jewelry store in California was robbed. Video shows four robbers storming the jewelry store that day, one of whom smashed a showcase with a hammer. The two clerks immediately fought back and drove the 4 robbers to the door, and then another clerk smashed the robber with a chair.
In the end, several clerks worked together to drive away the robbers.
Two of the employees who ran away the robbers were the sons and daughters of the owner of the jewelry store, the first such incident in their family's jewelry business years.