BOSTON -- Boston is marking the fifth anniversary of the deadly Boston Marathon bombings with solemn remembrances and charitable acts.
Democratic Mayor Marty Walsh and Republican Gov. Charlie Baker laid wreaths early Sunday at the spots along Boylston Street where two bombs killed three spectators and maimed more than 260 others on April 15, 2013.
One wreath was laid by Baker in front of Marathon Sports as bagpipes played. In another spot, the family of victims Martin Richard and Lingzi Lu were comforted by Walsh as a wreath was placed where the second bomb went off by the Atlantic Fish restaurant.
Hundreds gathered to watch silently behind barricades. People left bouquets of flowers, handwritten notes, candles and stuffed toys.
Both Baker and Walsh addressed families and survivors at a private ceremony inside the Boston Public Library.
"On April 15, 2013, our city changed forever, but over the last five years, we have reclaimed hope. We have reclaimed the finish line, and Boston has emerged with a new strength, a resilience rooted in love," Walsh said.
Jane and Henry Richard, siblings of the youngest victim and members of the family's foundation, also spoke.
Henry Richard urged those listening to follow Martin's message to "choose kindness and do more." The family's foundation was founded in 2014 to connect young people with opportunities for volunteerism and community engagement.
Lingzi's uncle, Sherman Yee, was present at the ceremony and private gathering.
"The family has been overwhelmed by love and support from all over the world," Yee said. He called Lingzi an "extraordinary girl" who represented the youth that come to the U.S. from China to study.
"While she didn't realize her dreams, as her family we invest in the youths through our foundation to keep her memory going," he said.
The bombs also killed 29-year-old Krystle Campbell, of Arlington. Massachusetts Institute of Technology police officer Sean Collier was killed in the line of duty during a confrontation with bomber Tamerlan Tzarneav.
Roxanne Simmonds was at commemorative ceremonies to honor her son, fallen Boston police officer Dennis Simmonds. Simmonds suffered a head injury on April 19, 2013, during a shootout with Dzhokhar and Tamerlan Tsarnaev as law enforcement closed in on them.
Dennis Simmonds suffered a fatal brain aneurysm a year later assessed to be the result of his injuries from the explosive device. Roxanne Simmonds said "DJ" was "brilliant and fearless -- he just loved Boston."
The youngest graduate of his class at Lasell College, Dennis Simmonds worked in Mattapan as an officer.
"It was important for him to be in a community with men and women who look like him," his mother said. "Individuals of color working hard to make sure their communities were safe."
Roxanne Simmonds praised Walsh, saying it was obvious how significant the victims are to the mayor.
Arreen Andrew, of Boston, said she was in the crowd across the stand when the first bomb went off in 2013.
"It was sheer panic," she recalled. "Just this sense of 'No, this can't happen to us.'"
Five years later, while the day is still a reminder of some painful memories, Andrew said it has also become a day about the relationships that have since been formed and "reformed and recreated our entire community."
At 2:49 p.m., a citywide moment of silence was observed, and the bells of Old South Church rang to mark the moment five years ago when the first bomb exploded.
Sunday is "One Boston Day," devoted to blood drives and acts of kindness.
Security is tight for Monday's 122nd running of the iconic race.