OAKLAND — Kaiser Permanante’s North Oakland campus near MacArthur Boulevard and Broadway was on lockdown Thursday afternoon as police surrounded a medical building and parking garage.

Kaiser employees said that the lockdown lasted 45 minutes, between approximately 2:45 p.m. and 3:30 p.m. The medical buildings are again operating normally.

Officers were concentrated around the Oakland Medical Office Building’s parking garage, according to a Kaiser spokesperson. The parking garage was back open to the public as of 3:30 p.m.

Authorities have not released details about why officers were in the area.

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