St. John’s International Airport lost air traffic control for about 15 minutes on Wednesday after carbon monoxide for the evacuation of the tower.

Airport firefighters and the St. John’s Regional Fire Department were responded to a carbon monoxide alarm around 10 a.m.┬áTemporary control tower operations had to be set up in another part of the airport.

By 1 p.m., carbon monoxide levels had returned to normal and so had air traffic control operations. There were no injuries.