Mayor of Boston Martin Walsh has said he hopes the death penalty, handed down to the Boston Marathon bomber, will provide a small amount of closure for all those affected by the attack.
A US jury sentenced Dzhokhar Tsarnaev to death for helping carry out the 2013 attack that killed three people and wounded 264 others at the world-renowned race, taking 15 hours to reach a decision.
Mr Walsh said: "I hope this verdict provides a small amount of closure to the survivors, families, and all impacted by the violent and tragic events surrounding the 2013 Boston Marathon.
"We will forever remember and honour those who lost their lives and were affected by those senseless acts of violence on our city," he said.
"Today, more than ever, we know that Boston is a city of hope, strength and resilience, that can overcome any challenge," Mr Walsh added.
The federal jury chose death by lethal injection for Tsarnaev, 21, over its only other option: life in prison without possibility of release.
The same panel last month found the ethnic Chechen guilty of placing a pair of homemade pressure-cooker bombs at the race's crowded finish line on 15 April 2013, as well as fatally shooting a policeman.
The bombing was one of the highest-profile attacks on US soil since 9/11 attacks in 2001.
Richard Donohue, a transit police officer who was badly wounded during the manhunt that followed the bombing:
"The verdict, undoubtedly a difficult decision for the jury, gives me relief and closure as well as the ability to keep moving forward."
US Attorney General Loretta Lynch said: "We know all too well that no verdict can heal the souls of those who lost loved ones, nor the minds and bodies of those who suffered life-changing injuries from this cowardly attack.
"But the ultimate penalty is a fitting punishment for this horrific crime and we hope that the completion of this prosecution will bring some measure of closure to the victims and their families," she said.
