Victoria McGrath was killed yesterday, along with another Northeastern student, Priscilla Perez Torres, the Boston school confirmed.
McGrath and Torres were on a personal trip and not studying abroad.
McGrath, 23, received severe shrapnel injuries to her left leg from the first of two bombs placed near the marathon finish line on April 15, 2013.
Bruce Mendelsohn, who was attending a post-marathon party in a building overlooking the finish line, rushed outside to help and saw McGrath lying on the ground, bleeding heavily from her left leg.
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Mendelsohn flagged down a firefighter, who carried McGrath away from the scene in what became one of the most widely used photographs from the bombing.
McGrath later tracked down her rescuers and formed friendships with them, Mendelsohn said.
"At the time, I was angry that anyone could do such a thing," Mendelsohn said of the bombing. "Now I'm angry that she's been taken from us."
A Northeastern spokesman said McGrath was scheduled to graduate this spring from Northeastern's school of business. She was originally from Weston, Connecticut.
Northeastern President Joseph E Aoun sent a letter today notifying the Northeastern community of the students' death.
"She was devoted to helping others through leadership in student organizations and community service work," Aoun said of McGrath.
Torres, who was also scheduled to graduate this spring, came to Northeastern from Guaynabo, Puerto Rico, and was passionate about travel and working on issues related to nutrition and women's health, Aoun said.