A section of the main terminal at Denver International Airport in Colorado, US, has been reopened after the airport was evacuated for two hours.
The evacuation was ordered after two unattended packages were found close to the American Airlines counter, reported 9News.
The section of the airport terminal was reopened after the police had ensured the boxes did not pose a threat to the airport.
Passengers were evacuated from levels five and six on the main terminal's west side, reported The Denver Channel.
An alert was sent to Federal Aviation Administration (FAA) and Transportation Security Administration (TSA) officials, and a sniffer dog was called in to check the boxes.
The police dog detected suspicious cargo in one of the boxes, which resulted in the evacuation.
The Denver Police bomb squad was also called in to investigate, while traffic at the airport was diverted to the main terminal's east side.
The ticket counters of American Airlines, Lufthansa, Aero Mexico, Air Canada and British Airways were affected by the evacuation, reported 9News.
Flight movements at the airport remained undisrupted. However, the airport did warn passengers of possible flight delays.
The investigation revealed that the boxes belonged to a family travelling to Vietnam, and contained spices and oils, reported Denver 7.
The incident occurred in less than 24 hours after the Brussels airport and a metro station was struck by series of explosions.
The US Department of Homeland Security has increased security at all airports after the Brussels attack.
Image: Denver International Airport was evacuated after suspicious packages were detected. Photo: courtesy of Sox23 / Wikipedia.