NEW YORK (CBSNewYork) – The New York state attorney general’s office confirms that it has been investigating faulty bolts that were used to construct the new Mario Cuomo Bridge.

State officials have confirmed they have been looking into the issue but won’t comment on the investigation into the replacement to the Tappan Zee Bridge.

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Published reports also say investigators looked into a possible cover up after bolts allegedly broke apart during construction.

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There are questions about whether the contractor tried to hide the problem from the Thruway Authority.

The reports claim about 60 of the approximately one million bolts used to construct the bridge’s twin spans failed.

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There are no immediate safety concerns.