JOHN TLUMACKI/GLOBE STAFF
A woman received help following the first of two explosions on Boylston Street Monday.
DAVID L. RYAN/GLOBE STAFF
Just seconds after the first explosion rocked the area near the finish line, there was a second blast a few blocks away on Boylston Street.
JOHN BLANDING/ GLOBE STAFF
Race volunteer Katherine Swierk (left) was reunited with her aunt Terry Days (center) and friend Jocelyn Cacio.
JOHN TLUMACKI/GLOBE STAFF
A victim of the first explosion near the finish line was helped on the sidewalk.
JOHN TLUMACKI/GLOBE STAFF
A woman knelt and prayed at the scene of the first explosion at the marathon finish line.
JOHN TLUMACKI/GLOBE STAFF
Boston Police examined blown-out windows at the scene of the first explosion.
JOHN TLUMACKI/GLOBE STAFF
A man comforted a victim near the race finish line. Across the city, people met up to seek solace amid tragedy.
BARRY CHIN/GLOBE STAFF
School buses lined both sides of Boylston Street where the street was locked down following the explosions.
ESSDRAS M. SUAREZ/GLOBE STAFF
Security forces blanketed Back Bay after twin blasts rocked the area around the marathon finish line.
ESSDRAS M SUAREZ/GLOBE STAFF
Boston Police set up a roadblock at Gloucester and Newbury streets as officials closed down a large part of Back Bay to facilitate an investigation.
