ST. LOUIS (KMOX) - Three st. louis police officers were taken to a hospital this afternoon for observation.

They were serving a warrant at the Mansion House Apartments on 4th Street in downtown St. Louis when they opened a container and were hit with a strong odor that caused headaches, breathing problems and profuse sweating.

There is no word on what caused the reaction, the investigation continues.  A test of the substance shows no hazardous material.  The officers are expected to be ok.

Police say the warrant they were serving was not drug related.

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