Security alert at Denver airport lifted after suspicious package investigation

Passengers wait in security lines at the Denver International Airport, Feb. 4, 2012. (Nathan Armes/Reuters)

The security alert at Denver International Airport has been lifted as police give the all-clear on suspicious packages, according to the airport’s Twitter.

.@DenverPolice has cleared the suspicious items. No threat found. West terminal will open to the public in a few minutes.

— Denver Int'l Airport (@DENAirport) March 22, 2016

Levels 6 and 5 are open to passengers. Level 6 remains closed to vehicles while police clear out.

— Denver Int'l Airport (@DENAirport) March 22, 2016

We thank our passengers for their patience during this investigation. Safety is our No. 1 concern. We will get back to normal shortly.

— Denver Int'l Airport (@DENAirport) March 22, 2016

American Airlines and United baggage will resume at their normal locations

— Denver Int'l Airport (@DENAirport) March 22, 2016

This is a developing story. Check back for updates.

Denver International Airport evacuated a section of its main terminal on Tuesday as officials investigated a possible security threat, airport officials said on Twitter.

The evacuation area included the west side of the main terminal levels 5 and 6, which includes baggage claim and passenger pickup, airport officials said. Flights continued while the possible threat was investigated.

Heightened security was put in place at major U.S. airports following attacks in Brussels earlier in the day.