Dozens of workers and immigration activists march to the Tom Cat Bakery to demonstrate after numerous employees of the bakery claimed they've received letters threatening dismissal in 10 days if they can't prove they're in the U.S. legally on March 22, 2017 in the Long Island City neighborhood of the Queens borough of New York City.

Earlier this month, workers at one of New York's largest bakeries were given an ultimatum: Within two weeks, produce papers showing you have legal authorization to work in the United States, or you'll be fired.

"After an ongoing audit, it was brought to our attention that documents you provided at the time of hiring in form I-9 does not currently authorize you to work in the United States," read a letter distributed to 31 employees of Tom Cat, an industrial bakery that supplies gourmet bread to hundreds of New York businesses.