Malfunctioning crossing arms at a train crossing in the northeastern part of the Denver metro area are causing major traffic backups.

That's according to Aurora police, who sent out a notice on social media that the train crossing is at the intersection of Tower Road and Smith Road and just south of Interstate 70.

File photo of a train crossing in an undefined location Marcia Straub / Getty Images

The rail lines are owned by Union Pacific. So far it's not clear what went wrong.

Aurora police said drivers should avoid the area.

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