More than a dozen people were injured early Friday when an airport employee shuttle bus crashed into a concrete divider at Newark Liberty International Airport, NJ.com reported.

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The injuries were not considered life-threatening, authorities said, but the crash tied up traffic at the airport and surrounding roads for a few hours, the website reported.

According to a spokesman with the Port Authority, the shuttle was approaching the terminal when it hit the barrier at 5:30 a.m., the North Jersey Record reported.

Flights were not impacted, Port Authority police told NJ.com.