Brazil ? In a joke that made Brazilians cringe and forced the U.S. Olympic Committee to apologize, a USOC worker scrawled “Welcome to the Congo!” on a board in the organization’s Rio de Janeiro media center for the Pan American Games.

Rio’s O Globo newspaper published a photo of the message on its front page Saturday, and ran a headline saying the joke was “full of prejudice.” The message was condemned in a nation extremely sensitive about being compared to less-developed countries, especially by Americans – often perceived as arrogant by Brazilians.

The controversy occurred as American athletes arrived in Latin America’s largest country to compete in the event that starts Friday.

The USOC issued a “deep apology to the people of Brazil and Rio de Janeiro” in a statement Saturday, and said the worker who wrote the phrase was disciplined and is no longer a member of the U.S. delegation to the games.

USOC officials also apologized in person to Rio Mayor Cesar Maia, senior officials of the Brazilian Olympic Committee and the Pan American Sports Organization. The USOC statement did not name the employee.