CHICAGO (CBS) — Chicago police were searching for three men who stole two cars and an SUV from the Ford assembly plant storage lot Wednesday afternoon.

Police said a dark-colored Buick pulled up to the entrance of a vehicle storage lot used by the Ford plant in Hegewisch around 1 p.m. Wednesday, and three men got out and stole two Taurus sedans and an Explorer SUV.

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One of the suspects struck a 68-year-old security guard who was trying to close a gate to prevent them from getting away, police said.

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The suspects fled south and got onto the Bishop Ford Freeway.

The injured guard was taken to Advocate Christ Medical Center in Oak Lawn in good condition, police said.

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Area South detectives were investigating.