PHILADELPHIA (AP) -- Philadelphia's City Council is forming a special committee to investigate the building collapse that killed six people and injured 13 last week.

The downtown building was being demolished when it collapsed onto a neighboring Salvation Army Thrift Store on Wednesday, killing two employees and four customers.

Police say a heavy equipment operator was high on marijuana when the accident happened. He surrendered Saturday to face charges in the deaths.

On Monday, City Council is planning to announce a special investigative committee in the wake of the collapse.

Council officials say the committee will conduct a broad review of procedures and regulations regarding licenses and permits, construction and demolition, the certification of workers and other issues.

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