Boylston Street reached capacity just before 1 p.m. on Monday afternoon, according to a tweet from the Boston Police Department.
Spectators for the Boston Marathon crowded the sidewalks and forced authorities to redirect new arrivals to Kenmore Square.
#MarathonSafetyTip: Boylston Street has reached capacity & is now closed to pedestrian traffic. Spectators being directed to Kenmore Sq.— Boston Police Dept. (@bostonpolice) April 21, 2014
We will update this story as more information becomes available.