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On Monday, three days after 36 people died in a fire at an Oakland warehouse, city building code inspectors sprang into action.

They descended on five other warehouses that authorities suspect are housing people illegally. Some of the properties, like the one gutted during a Friday night concert, had been the subject of complaints about building and safety code violations. None are permitted for residential living.

By Thursday, one of those properties had been cited, and inspectors planned to return to the other warehouses, public records reviewed by The Times show.

The inspections follow the growing scrutiny Oakland officials are facing over what many consider an inadequate response to safety concerns at the Ghost Ship warehouse, the scene of the deadliest fire in modern California history.

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