[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/06/07/art.nagin0607.gi.jpg caption="New Orleans Mayor Ray Nagin was on a flight with a passenger who is suspected of having the H1N1 swine flu virus."]
(CNN) - New Orleans, Louisiana, Mayor Ray Nagin, who traveled to China on an economic development trip, has been quarantined after possible exposure to the H1N1 virus, his office confirmed Sunday.
Nagin flew on a plane that also carried a passenger who is being treated for symptoms suspected to be from the virus, commonly known as swine flu, the mayor's office said in a statement.
Nagin, his wife and a member of his security detail have been quarantined in Shanghai, though all three remain symptom free, the statement said.
"The mayor is being treated with utmost courtesy by Chinese officials," the statement said.