Police Investigate 'Suspicious' Backpack at San Mateo Post Office

The post office was evacuated after a person on a motorcycle tossed the backpack near the main entrance of the post office on Delaware Street Tuesday morning.

The San Mateo Post Office on Delaware Street was evacuated Tuesday morning after a citizen observed a person on a motorcycle hurl a backpack near the main entrance then leave the area.

Police responded to the post office, located at 1630 S. Delaware St., just after 9 a.m. to reports of a "suspicious" backpack, San Mateo Police Sgt. Dave Norris said.

Officers immediately evacuated the post office and sealed off the driveway.

The San Mateo County Bomb Squad responded quickly to the scene and used their robot to move the backpack across the street to an evacuated car wash located just north of the post office, Norris said.

Once the backpack was moved to one of the stalls at the car wash, it was examined, and determined not to be a threat, according to Norris.

The operation took about one hour and both the post office and car wash have since reopened.

The motorcyclist had not been located as of 1 p.m. and the investigation is continuing.     

The San Mateo Police Department is looking for any information from the community that can assist us with this investigation. Anyone with information about this incident which involved a subject on a motorcycle depositing a backpack at the entrance of the main Post Office on Delaware Street in San Mateo at 9am on the morning of Tuesday, April 23 is urged to contact San Mateo Police at 650-522-7700.

SAFETY TIPS from San Mateo Police:

If you notice something out of place that you can’t readily identify—a suspicious object, odor, spilled or leaking liquid or powder, etc.—it’s best to treat it as a hazardous substance until proven otherwise.

Call Public Safety (Police/Fire Departments) immediately via 911 or the emergency dispatch phone number programmed into your mobile phone. 

SMPD Dispatch - 650-522-7700 
Describe the hazardous substance and its location.

Partner with us to protect and defend our neighborhoods:

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