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SAN DIEGO -- A stack of suspicious packages found outside the San Diego Union-Tribune building in downtown San Diego prompted evacuations and a call to the bomb squad Wednesday morning, but ultimately officials say there was never a threat to public safety.

The newspaper's headquarters are located at 600 B Street and employees were evacuated around 8:30 a.m. Senator Kamala Harris has an office in the same building, which is also home to the San Diego Fire Department Headquarters and the company Wework.

Reporter Kate Morrissey tweeted a picture of police tape and five boxes sitting beside an orange air pump outside the building.

Surveillance video showed a person drop off the packages at 1:45 a.m., according to SDPD. The packages were not addressed to anyone and did not have postal markings on them, though police did say there was "miscellaneous writing" scrawled on the boxes.

The evacuation orders were lifted at 9:30 a.m. after Bomb Squad investigators scanned the packages and determined they only contained children's books, shoes, football and an empty bag of chips.

The investigation followed a series of other suspicious devices being sent to the Clintons, Obamas and other political figures as well as CNN's headquarters at Time Warner Center. In CNN's case, investigators discovered an actual "live explosive device," NYPD said.

The fact that Harris -- an outspoken Democratic critic of President Donald Trump -- has an office in the San Diego building raised concerns that the suspicious packages might be linked to the other cases.

"Our office was evacuated today after suspicious packages were found near the building," Harris spokeswoman Lily Adams said on Twitter. "The packages were not addressed to the senator or our office. We are grateful to the San Diego Police Department for their work to swiftly investigate this issue."