Workers represented by one of the unions at Bally’s Twin River Casino voted overwhelmingly on Tuesday to authorize a strike over staffing and wage issues, according to a union spokeswoman.

The workers, who cast ballots from 8 a.m. to 8 p.m. Tuesday, voted 92% in favor of striking as soon as Friday, the day their contract with the casino expires, according to spokeswoman Lynette Ng.

The union, Local 26 of UNITE HERE, seeks increased staffing, with more full-time schedules, as well as wages that match increases in the cost of living.

Bally’s spokeswoman Patti Doyle decline to comment on the strike-authorization vote, saying the company would “speak to our union colleagues at the negotiating table.