A rolling strike of Starbucks baristas began Friday and grows to include about 300 of the coffee giant's shops across the U.S.

Starbucks workers have expanded their strike to more cities and closed 59 stores across the U.S. as of Monday, the union said amid stalled negotiations.

Unionized Starbucks employees conducted a one-day strike outside two Omaha locations Tuesday morning to advocate for better working conditions.