Massive Police Operation in Boston Area to Net Second Boston Bombing Suspect

Other suspect killed in a firefight with police

Boston and its suburbs remained in an unprecedented state of lockdown Friday afternoon as scores of police and federal agents searched for the remaining suspect in the Boston Marathon bombings, after his brother died in an early-morning confrontation with authorities.

The quest to find Dzhokhar A. Tsarnaev, a 19-year-old immigrant of Chechen origin who is also known as Jahar, riveted the nation, as cable networks and Web sites carried nonstop coverage and talk of the manhunt dominated Twitter. In Boston, the lockdown triggered the massive disruption of a major American city, with mass transit canceled, schools and business closed and hundreds of thousands residents ordered to stay indoors. A 20-block area of the suburb of Watertown was completely cordoned off.