About 1,070 hotel workers in the U.S. cities of Boston and Greenwich are on strike after contract talks with hotel operators Marriott International MAR.O, Hilton Worldwide HLT.N and Hyatt Hotels H.N stalled, the Unite Here union said on Sunday.

The strikes in Boston and Greenwich will last three days, the union said, adding that more hotel workers in different cities are expected to walk off the job across the U.S. throughout the Labor Day holiday weekend.

Unite Here, which represents workers in hotels, casinos and airports across the United States and Canada, said frustrated workers may strike in major destinations including San Francisco and Seattle as they struggle to agree with hotel operators on wages and on reversing pandemic-era job cuts.

"Strikes have also been authorized and could begin at any time in Baltimore, Honolulu, Kauai, New Haven, Oakland, Providence, San Diego, San Francisco, San Jose, and Seattle," Unite Here said in a statement.

A total of 40,000 Unite Here hotel workers in more than 20 cities are working under contracts that expire this year. About 15,000 of those workers have authorized strikes in 12 markets from Boston to Honolulu.

Workers have been in negotiations for new four-year contracts since May.

"We’re on strike because the hotel industry has gotten off track," Unite Here President Gwen Mills said.

"We won't accept a 'new normal' where hotel companies profit by cutting their offerings to guests and abandoning their commitments to workers," Mills added.

Unite Here workers in 2023 won record contracts in Los Angeles following rolling strikes and in Detroit after a 47-day strike.

In Las Vegas, casino operators MGM MGM.N, Caesars CZR.O and Wynn WYNN.O resorts reached an agreement in November to avert a strike with 40,000 hospitality workers days before a deadline that would have crippled the Vegas Strip.