MINNEAPOLIS (WCCO) — Three construction workers are hurt after a pole barn they were building collapsed.

It happened around 4:50 p.m. in Scandia.

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The Washington County Sheriff says the three men were setting trusses in a pole-barn type building. When they went to secure them, one tipped over. That caused a domino effect, causing several trusses to fall.

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A man inside was seriously hurt. Two men on the roof were injured but not as badly.

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All three were taken to the hospital.