The union that built the concert stage that collapsed at the State Fair is attempting to block a search warrant aimed at obtaining their training, disciplinary and other records.

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The Indiana Occupational Safety and Health Administration Thursday tried to serve the warrant at union headquarters as part of its investigation into the death of stagehand Nathan Byrd, one of seven people killed when the rigging toppled.

But IATSE attorney Bill Groth kept that from happening by keeping IOSHA investigators at bay until the warrant was no longer good for the day.

Groth contends that the search warrant is targeting the wrong entity and should go to Byrd's employer -- the State Fair Commission.

Indiana Department of Labor spokeswoman Chetrice Mosley says the agency is investigating the fatality as it would any other workplace death.

A court hearing on the issue is now set for Wednesday.