Former Secretary of State Hillary ClintonHillary Diane Rodham ClintonGrassley blasts Democrats over unwillingness to probe Clinton GOP lawmakers cite new allegations of political bias in FBI Top intel Dem: Trump Jr. refused to answer questions about Trump Tower discussions with father MORE said Wednesday night that she was struck by the first responders and volunteers who rushed to the aid of those injured in the Boston Marathon bombing earlier this week.

"I've been obsessed the last few days as I'm sure a number of you have been about the terrible violence and loss of life and injury in Boston," Clinton said, according to CNN during a speech at the anniversary gala for the Global Fund for Women in New York City.

"Like so many Americans and those watching around the world, we saw ordinary citizens alongside first responders rushing into danger to help. It was a tragic terrible day, but it seemed to exemplify what Patriots' Day really means, because we do better when we work together. Women and men, all of us across every line that is used to divide us," said Clinton.

The former first lady went on to say the response to the dual bombings, which left three dead and dozens more injured, was uniquely American.

"It is important that as our hearts go out and as our support for people who were affected in Boston that we remember what makes this country so unique: the sense of volunteerism," Clinton said.

A memorial service for the victims of the bombing is set for Thursday morning in Boston. President Obama and first lady Michelle ObamaMichelle LeVaughn Robinson ObamaObama on social media: You’ve got to ‘think before you tweet’ MSNBC trolls Trump with video montage of Obama saying ‘Merry Christmas’ Overnight Regulation: USDA delays healthy school lunch requirements | Senate panel advances controversial environmental pick | Drone industry pushes to ease rules | Dem commish joins energy regulator MORE will attend, as will former Republican presidential candidate Mitt Romney.

Clinton is seen as the frontrunner for the 2016 Democratic presidential nomination but has not yet said if she will consider a run.