Sean Collierwhile News Today

With hours until the race began, crowds flowed over the Finish Line Sunday, vying for photos on the Boston Athletic Association emblem, savoring street food, and grooving to music.

Authorities said Thursday that they’re not aware of any credible threats to Monday’s running of the Boston Marathon but urged the public to remain vigilant and vowed that security will be extensive on the 10th anniversary of the 2013 race bombings that killed three people and wounded hundreds more.