Trains back in service after smoke at DIA security checkpoint forces shutdown

DENVER — Trains are back up and running after being temporarily stopped at Denver International Airport on Tuesday evening when firefighters responded to smoke in the south Transportation Security Administration lanes.

Shortly after the closure, the bridges and select checkpoints reopened.

Airport officials said it was not an active emergency but the trains were stopped as a precaution.

About 5:45 p.m., airport officials gave the all-clear and said the situation was not a danger to the public; however, the south TSA checkpoint remained closed for further investigation.

The North and A bridge checkpoints were also reopened.

Video showed TSA agents blocking the escalators at one of the train stations.

There were no injuries.