By maria caporizzo
WASHINGTON (AP) -- President Barack Obama will visit Boston today, three days after a pair of deadly bombings at the Boston Marathon killed three people, including an 8-year-old boy, and wounded more than 170 people.
Massachusetts Gov. Deval Patrick says the president will be attending an interfaith service at the Cathedral of the Holy Cross.
Hours after the explosions, Obama vowed that those responsible would be brought to justice. In remarks on Tuesday, he called the bombings an act of terrorism but said investigators still don't know who carried them out.
He also said the American people refuse to be terrorized.