A fire chief in St. Helens, Ore., says 30 customers at a grocery store reported breathing difficulties, dizziness and other symptoms after saying they smelled a foul odor.

Columbia River Fire and Rescue Chief Jay Tappan said the store was temporarily closed while officials look for the cause of the odor, described as smelling like a gas or ammonia.

The Oregonian reports ( http://is.gd/PT5Skm) one man was taken to a hospital as a precaution late Wednesday afternoon.

Most customers said they felt better once they got outside.

St. Helens is north of Portland.

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Information from: The Oregonian, http://www.oregonlive.com