The U.S. Postal Service says it will seal dozens of blue mail collection boxes along the Boston Marathon route in the interest of safety and security.
The Postal Service made the announcement Friday amid the remembrances of the third anniversary of the marathon bombings.
The boxes will be sealed at the time of the last mail collection Saturday and reopened Tuesday. The marathon is Monday.
The closures affect boxes along the entire route from Hopkinton to Boston.
Security along the route has been bolstered since two pressure cooker bombs hidden inside backpacks were detonated near the finish line in 2013, killing three and injuring more than 260.
Among the items organizers have banned from the marathon are packages or other bulky items and certain containers.
