Senators in Puerto Rico have approved a bill to overhaul the island's crumbling pension system as hundreds of irate public employees protested outside the seaside Capitol building.

The House of Representatives was expected to approve the bill late Thursday, and Gov. Alejandro Garcia Padilla was expected to sign it as well.

The bill calls for a higher retirement age, a nearly 2 percent increase in worker contributions and reduced benefits and monthly pensions for certain employees. It also would transfer the bulk of employees from a defined-benefit plan to a hybrid plan that includes a defined contribution component.