Immigration officials have rejected former world chess champion Bobby Fischer's appeal of their decision to deport him for attempting to travel on an invalid U.S. passport, an adviser to Fischer said Wednesday.

The decision was made Tuesday at the end of a two-day hearing, according to John Bosnitch, a Canadian journalist who acted as an adviser to Fischer during the proceedings. Fischer, who considers his detention "a kidnapping," can appeal again, Bosnitch said.

Fischer was apprehended two weeks ago after trying to board a flight at the Narita International Airport for allegedly traveling with a revoked U.S. passport. He is wanted in the United States for playing a chess match in the former Yugoslavia in 1992 in defiance of international sanctions.