Diane Sawyer to Anchor a Special Expanded One-Hour Edition of "ABC World News"

ABC News to Air a Special Edition of "20/20? with Elizabeth Vargas Anchoring From Boston

"Nightline" Will Provide the Whole Picture of the Days Events for Viewers in Late-Night

ABC News has been providing special coverage of the manhunt in Boston since 3:37 a.m., ET and aired a special live broadcast of "Nightline" on the west coast. Diane Sawyer joined George Stephanopoulos and the "GMA" anchor team in Times Square as the network continued its coverage throughout the morning.

ABC News will deliver comprehensive reporting on the developing situation throughout the day and night across all ABC News broadcasts and platforms:

• " World News with Diane Sawyer" will air a special one-hour edition on Friday evening.
• Elizabeth Vargas will anchor a special edition of " 20/20" live from Boston tonight.
• " Nightline" will live from Boston with Juju Chang reporting.
• ABCNews.com has live updates here: http://abcn.ws/12sva4s. ABC News is also live-streaming coverage as news warrants at abcnews.go.com/live.
• ABC News Radio Correspondents Aaron Katersky and Steven Portnoy are reporting from Boston.
• ABC NewsOne Correspondents Marci Gonzalez and Tahman Bradley are reporting from Boston for nearly 200 ABC affiliates, stations and clients.

Residents of Watertown, Massachusetts were awakened overnight by heavy police presence and a dramatic shootout that ended with the death of one of the Boston marathon bombing suspects while the second is still on the loose. The Boston area remains effectively locked down.

ABC's Bianna Golodryga spoke to the father of the Boston bomb suspect on two occasions this morning. The father delivered a message to his son, telling him to surrender. "Give up. Give up. You have a bright future ahead of you. Come home to Russia," the dad said. The father warned, however, "If they killed him, then all hell would break loose." - full report: http://abcn.ws/11o7qw8

ABC's Brian Ross and his team provided viewers with exclusive video footage of the bullet riddled Mercedes SUV the suspects hijacked and used during a firefight with police - watch here: http://abcn.ws/11qXZdU.

ABC News to two former classmates of the suspect. Sierra Schwartz who went to school with Suspect #2, Dzhokhar Tsarnaev, on "Good Morning America." She says the suspect, 19, never seemed suspicious and was a "nice, funny guy" - watch here: http://abcn.ws/XV252c.

Steven Owens, another former classmate of the suspect, said, "he was a great kid." Owens said he met Dzhokhar Tsarnaev in 2006 and knew him during middle and high school - watch here: http://abcn.ws/13mcceQ