PHILADELPHIA (CBS) — Hazmat and fire crews responded to an IRS building in University City after an envelope with a “peculiar smell” was found in the mail room.

Crews were called to the 2900 block of Market Street, around 10:30 a.m.

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Police say workers found a wet envelope with a “peculiar smell” and then reported having eye irritation.

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The building was not evacuated, but the mail room was closed while crews investigated.

Hazmat crews found the substance in envelope deemed to be non-hazardous

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No one was taken to the hospital.