Almost 36,000 athletes will run in the 118th Boston Marathon today in the first running of the race since last year's bombing.
Massachusetts Governor Deval Patrick said security will be tighter than ever for this year's running of the world's oldest marathon.
Runners attending the event will have to use clear plastic bags for their belongings, and fans hoping to watch near the finish line are encouraged to leave strollers and backpacks behind.
An image allegedly showing the last words written by suspected Boston Marathon bomber Dzhokhar Tsarnaev, before he was captured, have been obtained by ABC News.
The writing was apparently found on the wall of the boat he was arrested in.
ABC have transcribed what they believe to be the inscription on the boat walls:
“The U.S. government is killing our innocent civilians, but most of you already know that… I can’t stand to see such [bullet hole] go unpunished,” said the note ABC News obtained from a law enforcement official.
“We Muslims are one body. You kill one of us, you hurt [bullet hole] us all.”
A reporter from 7News in Boston has said a man has been charged in relation to leaving an unattended backpack at the finish line of the Boston Marathon.
Jennifer Eagan also said the man told police he had a rice cooker in his backpack.
Charges man with backpack at finish line will face: Possession of hoax device, Disorderly conduct, Disturbing the peace
BPD: With the marathon coming we are taking this seriously.
Man told police he had a rice cooker in the backpack.
A lone officer from the bomb squad was captured on video destroying an unattended backpack left near to the Boston Marathon finish line. A man remains in police custody in connection with the incident.
A member of the police bomb squad walks away from an unattended backpack left on the road near the finish line of the Boston Marathon in Boston. A man is in police custody following the security alert, which prompted evacuations of the surrounding area.
The Boston Police Department has confirmed two unattended bags left at the Boston Marathon finish line have been destroyed, as a precaution. A man remains in custody.
The Boston Police Department has tweeted that a man is in custody after two unattended backpacks were found near the Boston Marathon finish line, a year on from the bomb attacks.
The Boston Police Department is asking people to avoid the area surrounding the Boston Marathon after two unattended backpacks were discovered. The bomb squad is on the scene.
Earlier today a memorial service was held to mark the first anniversary of the bomb attacks.
Public Safety Alert: #BPD investigating 2 unattended backpacks found in the area of Boston Marathon Finish Line.
Public Safety Alert: #BPD asking pedestrians & motorists to avoid the area in and around the Boston Marathon Finish Line.
Local media is reporting two suspicious packages have been identified near to the finish line of the Boston Marathon, prompting evacuations.
A memorial service has been taking place to mark the first anniversary of the bombings.
US leaders including Vice President Joe Biden and survivors of the Boston Marathon bombing shared messages of thanks and defiance at a tribute to the three people killed and 264 wounded in the attack exactly one year ago.
From Patrick Downes, who lost a leg when a pair of homemade bombs ripped through the crowds at the race's finish line, to Biden, speakers recalled how those on the scene, from police officers to spectators, reacted immediately to help the wounded amid the chaos on April 15, 2013.
Former Boston Mayor Thomas Menino, who managed the response to the attack in the final year of his two decades in office, recalled the struggles of the families of Martin Richard, 8, Krystle Campbell, 29, and Chinese national Lu Lingzi, 23, who died in the attack