Numerous news agencies are now reporting that a bomb—or possibly several bombs—exploded near the finish line of this afternoon’s Boston Marathon at the Fairmount Copley Plaza Hotel. Boston.com reports that “multiple” people have been injured while The Boston Globe has the figure as “at least a dozen.” The damaged area, according to photos uploaded by onlookers and journalists to Twitter, appears chaotic, smokey, and partially evacuated. Horrifyingly, eyewitnesses have reported “blood everywhere.”

We will update as more information comes in; for breaking updates, see the Boston.com and Boston Globe Twitter feeds. . .