Two men and two women were facing disorderly conduct charges after they chained themselves to Tom Cat Bakery's delivery trucks in Long Island City.
They stopped the trucks from leaving the 10th Street bakery in the morning.
The protesters hoped the demonstration would spark a citywide "Day Without Bread," for others to forgo selling or eating bread as a statement for immigrant rights.
Workers at the bakery faced a Friday deadline to produce immigration papers, and instead of working their last shifts, they protested outside. They also staged a protest at President Donald Trump's Manhattan home earlier this month.
"The Trump administration may want us to quietly disappear, but we're not going away silently," bakery worker Henry Rivera said. "We're on strike today to send a message that we help make America great, and we cannot just be thrown away like day-old bread."
In addition to firings, the 31 employees of Tom Cat faced deportation if they could not prove by Friday that they're working in the U.S. legally.
Many have worked on the gourmet bakery's production line for much of its 30-year existence.
Tom Cat covers a whole city block in Queens, churning out artisanal bread 24 hours a day and delivering it around in the New York City area.