UC Santa Barbara students attend a candlelight vigil following Friday's series of drive-by shootings that left 7 people dead in the Isla Vista section of Santa Barbara May 24, 2014.
Obama convened a meeting of the National Security Council to review the events related to the Boston Marathon bombing and discuss the ongoing investigation of its causes.
Authorities of the city of West, the US state of Texas, on Saturday declared to impose curfew while allowing some of the evacuated residents to return home in the afternoon.
The families of the two Chinese victims in Boston explosions arrived the city on Friday.
Boston bombing suspect detained
A suspect of the deadly Boston Marathon bombings has been nabbed, authorities announced Friday night, wrapping up a day-long manhunt and making local residents feel relieved.
They gathered in silence on Boylston Street, just three blocks away from the chaos and carnage caused by twin bombings four days earlier. Some were crying.
The FBI in 2011 interviewed the elder of the two brothers who are suspects in Monday's deadly Boston Marathon bombings, acting at the request of an unidentified foreign government, a US law enforcement source said on Friday.
Multiple gunshots were reported Friday night in Boston suburb of Watertown minutes after authorities lifted the stay-indoors warning for people in the Boston area. FBI interviewed Boston suspect in 2011
Massive manhunt
Boston in lockdown
$560,000 raised for memorial scholarship
Two suspects in the Boston Marathon bombing - identified as coming from a Russian region near Chechnya - killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large on Friday, authorities said.
Boston police locked down much of the vibrant town in search of one of the suspects allegedly involved in the deadly bombing at the city's marathon held on Monday.
At least 12 people died, 20 are still missing and another 50 injured when their boat sank in the Ariri river in the heart of the Amazonian region early Friday.
Sixty people remained unaccounted for after Wednesday's explosion at a fertilizer plant in the US state of Texas, a US senator said on Friday.
It took only 10 minutes on Wednesday for the Campaign for Boston University Board of Trustees to raise $560,000 for a scholarship in memory of Lu Lingzi, the Chinese graduate student from Shenyang who was killed in the Boston Marathon bombings.