U.S. postal inspectors on Sunday were trying to track down the person who put a suspicious device in an Oakland mail collection box.
The threat forced two major streets to shut down for hours Saturday night.
Investigators said it was not a piece of mail; it was a device dropped inside a blue collection box. Postal inspectors were still trying to figure out exactly what the device is.
The device was found by a postal carrier making a usual stop at a collection box on the corner of Stanford and San Pablo avenues.
“It looked very, very suspicious,” USPS Inspector Jeff Fitch said.
Police and the Alameda County sheriff’s bomb squad were called in to determine if it was an explosive device. The bomb squad ultimately destroyed the device. NBC Bay Area