Three businesses in Diamond Bar had their windows smashed overnight early Thursday, leaving glass shards on the strip mall's sidewalk.
The Los Angeles Sheriff's Department Walnut responded to a burglar alarm call in the 20000 block of Golden Springs Drive just after 2 a.m.
Happy Pet Grooming, Walnut Companion Animal Hospital and Wanut 6 Star Villa Foot Spa were all targeted, according to officials.
No reports of stolen items have been made.
Authorities are investigating the vandalism.
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