A woman asks a police officer when she will be allowed back to her home in a cordoned off area on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. According to reports, one suspect has been killed during a car chase and the police are seeking another — believed to be the same person wanted in connection with the deadly bombing at the Boston Marathon earlier this week.