Portions of a lobby and baggage-claim area at the O’Hare International Airport in Chicago, US, had to be evacuated after an unattended bag was found at the premises.

However, operations were resumed after two hours once the Chicago Police Department’s bomb squad cleared the bag that was found at a door.

The evacuation occurred at the airport’s Terminal 1, which is the main terminal for United Continental Holdings and its commuter partners and two alliance partners; All Nippon Airways and Deutsche Lufthansa.

"Transportation security administration screeners, airline workers and passengers were evacuated."

CBS Chicago reported that an unattended bag in the upper level of the terminal prompted the response from the Chicago police at about 9.30am. Police said the ticketing area and baggage claim at Terminal 1 were evacuated, while the upper and lower level inner roadways were partially closed. The airport transportation system to Terminal 1 was also suspended during the hour-long investigation.

Transportation security administration screeners, airline workers and passengers were evacuated. United Continental resumed checking some passengers at Terminal 2 where the carrier also has some gates.

After the reopening of the terminal, the carrier said that they did not expect any major effect on its operations but suggested minor delays.

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