VIDEO------> Shatterproof Glass Foils Group of Jewelry Store Robbers

They walk away with nothing...

CBS SF  — Police in Pleasanton are investigating an attempted robbery at a jewelry store Monday where a group of suspects armed with pepper spray and hammers tried to break into glass display cases, authorities said.

The suspects then made unsuccessful efforts to break the glass-enclosed display cases with hammers, realizing the glass was shatter proof.

After failing to break into the jewelry display cases, the suspects fled