Rep. Rashida Tlaib, a Michigan Democrat, was arrested at Detroit Metro Airport Friday while joining a protest by airline workers.

Photos by a spokeswoman for the hospitality workers' union UNITE HERE showed Tlaib joining catering workers for Delta Air Lines, who were protesting for higher wages and better healthcare.

Tlaib was detained briefly and then released, according to the ABC affiliate for Chicago.

A spokesperson for Tlaib could not be reached for comment.

Tlaib, 43, a staunch and often controversial liberal, is one of the four freshman House representatives know as "the Squad," a Democratic coalition of liberal women that also includes Reps. Ilhan Omar of Minnesota, Alexandria Ocasio-Cortez of New York, and Ayanna Pressley of Massachusetts.