CHICAGO (CBS) -- Starbucks workers were back on the picket line in Chicago Sunday afternoon—as they continue a five-day strike Friday to protest lack of progress in contract negotiations with the company. Baristas at the store at 5964 N. Ridge Ave.

Get all the news you need in your inbox each morning. "We're calling on allies to join us at 3 "anchor" picket lines TODAY. Each day, we'll announce more locations," the union posted on social media.

Workers at some Starbucks stores started a five-day strike Friday in three U.S. cities, including Chicago, to protest lack of progress in contract negotiations with the company. S