By CBS 2 Chicago Staff

MARKHAM, Ill. (CBS) — Construction of a new Amazon facility in south suburban Markham came to a halt Wednesday because of a union strike.

Picketers were seen outside the nearly-completed robotic fulfillment facility in Markham. Union carpenters are accusing Amazon of bringing in non-union workers after hours.

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Markham Mayor Roger Agpawa said he is watching closely to make sure the stoppage does not drag on for too long.

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“What the impact is, is very the hope Amazon brought to Markham to begin with – and that is, jobs economic opportunity in the area, and certainly for Markham to benefit – and even in the region,” Agpawa said.

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The Amazon facility is expected to be up and running by October, bringing in more than 1,000 jobs to the area.

CBS 2 Chicago Staff