SAN RAMON, Calif. —

At least two dozen people wearing masks and some carrying pickaxes and handguns smashed jewelry cases and made off with bags full of items during a robbery at a San Francisco Bay Area jewelry store, authorities said.

Video above from the Monday robbery shows a stream of people wearing masks covering their entire faces entering the jewelry store and then using the pickaxes to crack the glass cases and clear them out. Advertisement

The shop's doors locked after the robbers were inside because of security measures put in place after the store was previously robbed, and at least one of the people fired a handgun at the door to get out, police said.

No one was injured, according to police.

Messages seeking more information were left Thursday with authorities.

The robb

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