An explosion was reported near the Boston Marathon finishline on Monday, per Reuters:
Boston marathon headquarters locked down after explosion reported near finish line: spokesman #breaking
— Reuters US News (@ReutersUS) April 15, 2013
Large explosion at Coply Square during marathon @universalhub twitter.com/Boston_to_a_T/…
— Boston to a T (@Boston_to_a_T) April 15, 2013
Explosion at coply twitter.com/Boston_to_a_T/…
— Boston to a T (@Boston_to_a_T) April 15, 2013