BOSTON (AP) — Peace activists are planning to gather on Boston Common to voice their support for a deal struck between the U.S. and other world powers and Iran.

The accord is intended to curb Iran’s nuclear program in exchange for billions of dollars in relief from international sanctions.

READ MORE: Trail Blazers Rally Past Celtics 109-105

The activists say they want to help educate the public about what is at stake.

Cole Harrison, executive director of Massachusetts Peace Action, said activists are concerned because some members of Massachusetts all-Democratic congressional delegation have yet to “unambiguously” declare their support for the accord.

READ MORE: Mendon Restaurant Staff Stunned By $4,000 Tip Left By Peloton Challenge Team

Congress has 60 days to review the agreement. Lawmakers could hold a vote of disapproval and take additional action.

Activists were gathering at about 1 p.m. Saturday near the MBTA Park Street station.

MORE NEWS: Driver Struck And Killed By Commuter Rail Train At Wilmington Crossing

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.