Negotiations between Republic and Teamsters Local 25 union have stalled over wages, benefits, working conditions, and paid time off, according the union.

A trash collectors strike could disrupt service in 16 cities and towns across Massachusetts. More than 400 workers from Republic Services walked off the job early Tuesday morning. They're demanding better pay and benefits.

Teamsters Local 25 represents about 450 workers that service over a dozen municipal contracts. The union has threatened to extend the strike to other parts of the country if the two sides cannot come to terms.