Addressing the American public from the White House Briefing Room Monday evening, President Obama vowed to respond with the “full weight of justice” on the individuals responsible for the explosions at the finish line of the Boston Marathon.

More than a hundred people were injured in the blast and two are confirmed dead, including an 8-year-old boy.

“We still do not know who did this and why,” the president said. “And people should not jump to conclusions before we have all the facts.”