Denver airport
© Joe Amon, The Denver PostThe Denver International Airport and hotel from the far side of the airfield.
A section of Denver International Airport has been evacuated because of a possible suspicious package, officials said Tuesday.

Denver police are evacuating a part of the main terminal on the west side between doors 600 and 610 on level six and 500 to 510 on level five, according to an airport tweet. Level five is the bag claim and passenger pickup level, and level six is for passenger dropoff and check-in.

Affected ticket counters include: American Airlines, Aero Mexico, Air Canada, Lufthansa and British Airways. Flights are continuing, the airport said, although delays are possible.

Details about the the DIA threat have not yet been released, other than saying police are investigating a suspicious package.

"As a precaution, TSA is deploying additional security to major U.S. airports and at various rail and transit stations," said a tweet from Homeland Security Secretary Jeh Johnson.

Vehicle traffic is not being allowed on the west side of the terminal, officials said. The east side of the terminal remains open to passengers.

Level five baggage claim and the west side is currently closed. Airlines are working to coordinate baggage delivery to the east side.

Ryan Hitchler is in concourse C of the airport and said there was "no notice whatsoever" of the disturbance in that area. His flight is on time, he said.

Major cities across the nation have been on heightened alert Tuesday in the wake of terrorist attacks in Brussels.


Comment: Surprise! U.S. police departments waste no time in beefing up security after the Brussels bombings


The Denver airport said earlier it was not instructed by the Transportation Security Administration or the Department of Homeland Security to increase any security measures after the Brussels attacks that left dozens dead.

This is a developing story that will be updated as more information becomes available.