CHICAGO (AP) — The Chicago Symphony Orchestra has reached a tentative labor agreement with its musicians, who went on strike over the weekend.

The orchestra and the Chicago Federation of Musicians announced the new three-year collective bargaining agreement in a joint news release Monday evening. Details of the agreement weren't provided.

The musicians and the symphony association's board of trustees must ratify the agreement. Once ratified, it will take effect retroactively Sept. 17.

Symphony officials say all previously scheduled activities will proceed as planned.

Musicians went on strike Saturday over wages and health care costs, forcing the cancellation of the season's first Saturday night show less than two hours before it started.

Negotiations between the musicians and management started this summer. The previous collective bargaining agreement expired at midnight Sept.

16.