8:58 p.m.: The Boston Police Department tweets: "CAPTURED!!! The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."
9:30 p.m.: Government and law enforcement officials hold a news conference marking a milestone in what FBI Special Agent in Charge Richard DesLauriers called "truly an absolutely intense investigation."
"We're so grateful to bring justice and closure to this case," Massachusetts State Police spokesman Col. Timothy Alben said.
Adds Gov. Deval Patrick, "It's a night where I think we're all going to rest easy."