(NBC) - The Boston Marathon crime scene has been released by Federal investigators and returned to the city of Boston.

In a brief ceremony near the marathon's finish line a U.S. flag was lowered and given to the mayor.

The city can now prepare to re-open Boylston Street and the six block area that was cordoned off as the crime scene.

Officials will remove debris, do environmental testing, and check the safety of buildings in the area. People will soon be able to reclaim their personal property left at the scene.