Authorities evacuated part of an office building at the Minneapolis-St. Paul Airport Wednesday afternoon, after odors from construction work leaked into the air vents.
Four people were treated at the scene, and two were transported to a nearby hospital, but authorities say that none of the injuries was serious.
Construction crews are renovating the building, which will become the new Delta North headquarters. The building sits next to an aircraft hanger, and is not connected to the terminal complex.
Workers on the roof had applied an adhesive near an air intake, and the odor blew into the building.
Metropolitan Airports Commission spokesman Patrick Hogan says part of the building was evacuated at about 1:30 p.m., and it was reopened about an hour later after the building could be ventilated.
Hogan said the quantity of adhesive being used is unlikely to cause serious health problems.