This article is from the source 'bbc' and was first published or seen on . It last changed over 40 days ago and won't be checked again for changes.

You can find the current article at its original source at http://www.bbc.co.uk/news/world-us-canada-22286328

The article has changed 5 times. There is an RSS feed of changes available.

Version 1 Version 2
Boston bombs: Memorial for slain officer Sean Collier Boston bombs: Memorial for slain officer Sean Collier
(35 minutes later)
Thousands of mourners are holding a memorial for a university police officer killed during the hunt for the Boston marathon bombing suspects. Thousands of mourners have held a memorial for a university police officer killed during the hunt for the Boston marathon bombing suspects.
US Vice-President Joe Biden is to address the service in memory of 26-year-old Sean Collier at the Massachusetts Institute of Technology. US Vice-President Joe Biden spoke at the service in memory of 26-year-old Sean Collier at the Massachusetts Institute of Technology.
As many as 10,000 students, staff and police officials from around the country are expected to attend. About 4,000 students, staff and police officials from around the country attended the ceremony.
Authorities say Collier was killed by the brothers suspected of the bombing.Authorities say Collier was killed by the brothers suspected of the bombing.
He had worked for the prestigious university's police department for more than a year and was involved in campus activities, in addition to his role as an officer. He had worked for the prestigious university's police department for more than a year and had been involved in campus activities, in addition to his role as an officer.
'Completely genuine''Completely genuine'
Queues of mourners stretched for about half a mile, an hour before Wednesday's ceremony started.Queues of mourners stretched for about half a mile, an hour before Wednesday's ceremony started.
They made their way through tight security, including metal detectors and bomb-sniffing dogs.They made their way through tight security, including metal detectors and bomb-sniffing dogs.
During the ceremony, Collier's brothers thanked police officers and others for their support.During the ceremony, Collier's brothers thanked police officers and others for their support.
In his remarks on Wednesday, Mr Biden told the family: "My heart goes out to you. I hope you find some solace in this time of extreme grief."
He also said the diversity and innovation of the university represented a "nightmare" for those who hated and would attack America.
"The only way they can gain ground is to instil fear that causes us to jettison our values, way of life, for us to change," Mr Biden said.
Massachusetts Institute of Technology Police Chief John DiFava remembered how the young officer had once asked to volunteer at a homeless shelter.Massachusetts Institute of Technology Police Chief John DiFava remembered how the young officer had once asked to volunteer at a homeless shelter.
"He hoped to 'maybe deal with issues before they became problems'," Mr DiFava said."He hoped to 'maybe deal with issues before they became problems'," Mr DiFava said.
Collier was laid to rest in a private funeral on Tuesday.Collier was laid to rest in a private funeral on Tuesday.
"He is the one of the nicest people that I've ever met," Kelly Daumit, an engineering student who hiked with Collier as part of a university social club, told AP news agency. "He is one of the nicest people that I've ever met," Kelly Daumit, an engineering student who hiked with Collier as part of a university social club, told AP news agency.
"Everything people are saying about him is completely genuine; it's not because of what happened.""Everything people are saying about him is completely genuine; it's not because of what happened."
Collier was shot dead in his car on 18 April, three days after the bombing of the marathon.
Suspects' parents 'interviewed'Suspects' parents 'interviewed'
Collier was shot dead in his car on 18 April, three days after the bombing of the marathon.
The shooting led to a huge manhunt that ended in the death of suspect Tamerlan Tsarnaev and the wounding of his younger brother and alleged accomplice, Dzhokhar.The shooting led to a huge manhunt that ended in the death of suspect Tamerlan Tsarnaev and the wounding of his younger brother and alleged accomplice, Dzhokhar.
In a court hearing on Monday before a federal magistrate judge in Beth Israel Deaconess Medical Center, Dzhokhar Tsarnaev was charged at his hospital bedside with crimes that could result in the death penalty if convicted.In a court hearing on Monday before a federal magistrate judge in Beth Israel Deaconess Medical Center, Dzhokhar Tsarnaev was charged at his hospital bedside with crimes that could result in the death penalty if convicted.
US officials say the ethnic Chechen brothers planted and detonated two pressure-cooker bombs near the finish line of the Boston marathon on 15 April, killing three people and injuring more than 260. Ten people lost limbs in the bombing.US officials say the ethnic Chechen brothers planted and detonated two pressure-cooker bombs near the finish line of the Boston marathon on 15 April, killing three people and injuring more than 260. Ten people lost limbs in the bombing.
US investigators are in contact with the bombing suspects' parents in southern Russia, an American embassy official said on Wednesday.US investigators are in contact with the bombing suspects' parents in southern Russia, an American embassy official said on Wednesday.
An unnamed official told the AP news agency that US investigators were working with the Russian security services, the FSB.An unnamed official told the AP news agency that US investigators were working with the Russian security services, the FSB.
He would not say how long the Americans planned to stay in Dagestan, a region in the southern area of the country.He would not say how long the Americans planned to stay in Dagestan, a region in the southern area of the country.
The father was quoted as telling the Russian state news agency RIA Novosti that both parents planned to fly to the US on Thursday.The father was quoted as telling the Russian state news agency RIA Novosti that both parents planned to fly to the US on Thursday.