Authorities have image of bombing suspect

In Hopkinton, people held hands in a vigil near the Boston Marathon starting line Wednesday.

Wendy Maeda/Globe Staff

In Hopkinton, people held hands in a vigil near the Boston Marathon starting line Wednesday.

A banner in Hopkinton with a message of support for victims of the finish line bombings.

Wendy Maeda/Globe Staff

A banner in Hopkinton with a message of support for victims of the finish line bombings.

US Marshals stood guard outside Boston's Moakley Federal Courthouse after if was evacuated Wednesday afternoon.

Charles Krupa/AP

US Marshals stood guard outside Boston's Moakley Federal Courthouse after if was evacuated Wednesday afternoon.

Media and others descended upon the courthouse after initial reports suggested a suspect in the Boston Marathon bombings was arrested and would appear at the courthouse.

Jared Wickerham/Getty Images

Media and others descended upon the courthouse after initial reports suggested a suspect in the Boston Marathon bombings was arrested and would appear at the courthouse.

Employees were evacuated from the courthouse after a bomb threat was received.

CJ GUNTHER/EPA

Employees were evacuated from the courthouse after a bomb threat was received.

An officer patrolled outside the courthouse Wednesday afternoon.

Michael Dwyer/AP

An officer patrolled outside the courthouse Wednesday afternoon.

Investigators combed through the scene of one of the blast sites on Wednesday morning.

Julio Cortez/Associated Press

Investigators combed through the scene of one of the blast sites on Wednesday morning.

A sign was taped to a barricade near the site of the bombings on Wednesday.

Bill Greene/Globe Staff

A sign was taped to a barricade near the site of the bombings on Wednesday.

Robert Bakoian of Boston prayed at the barricade to the crime scene at Boylston and Berkeley streets on Wednesday.

Bill Greene/Globe Staff

Robert Bakoian of Boston prayed at the barricade to the crime scene at Boylston and Berkeley streets on Wednesday.

Victoria Kichuk (left) of Brighton visited the makeshift memorial at Boylston and Berkeley streets.

Bill Greene/Globe Staff

Victoria Kichuk (left) of Brighton visited the makeshift memorial at Boylston and Berkeley streets.

Investigators worked at the scene on Boylston Street, and hundreds of officers fanned out across the city Tuesday.

John Tlumacki/Globe Staff

Investigators worked at the scene on Boylston Street, and hundreds of officers fanned out across the city Tuesday.

This image shows the remains of a pressure cooker that the FBI says was part of one of the bombs.

Reuters

This image shows the remains of a pressure cooker that the FBI says was part of one of the bombs.

Remains of what may have been part of the bomb.

Reuters

Remains of what may have been part of the bomb.

Remains of a backpack the FBI says contained one bomb.

ASSOCIATED PRESS

Remains of a backpack the FBI says contained one bomb.

Garvey Park in Dorchester was nearly filled with people during the vigil for Martin Richard, who was killed in Monday's blasts.

Yoon S. Byun/globe staff

Garvey Park in Dorchester was nearly filled with people during the vigil for Martin Richard, who was killed in Monday's blasts.

Members of the military walked along Boylston Street near the finish line of the Boston Marathon.

Aram Boghosian for The Boston Globe

Members of the military walked along Boylston Street near the finish line of the Boston Marathon.

Sox second baseman Dustin Pedroia walked past a sign from an Indians fan in the dugout.

Mark Duncan

Sox second baseman Dustin Pedroia walked past a sign from an Indians fan in the dugout.

Investigators were combing through the aftermath of the deadly Boston Marathon terrorist attack Tuesday.

John Tlumacki/Globe Staff

Investigators were combing through the aftermath of the deadly Boston Marathon terrorist attack Tuesday.

Suspect seen carrying, and perhaps dropping, black bag

Investigators are “very close” in the investigation, but officials issued statements firmly denying widespread media reports that a suspect was in custody.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/17/BostonGlobe.com/Metro/Images/410481e440ce42d780aceba434a1f627-410481e440ce42d780aceba434a1f627-0-1852[1].jpg Victims of the Boston Marathon bombings

A list of those confirmed killed or injured in the Boston Marathon explosion.

Lingzi Lu, a Boston University graduate student, was killed in the Boston Marathon bombings Monday.

BU identifies third Marathon victim

Lingzi Lu, a Chinese graduate student at Boston University in mathematics and statistics, was the third victim of the marathon bombing.

President Obama and Democratic leaders failed to round up 60 votes in favor of enhanced background checks, a major initiative for Obama.

Senate gun vote

Measure for expanded background checks fails

The key element of the federal response to the elementary school massacre in Newtown, Conn. failed Wednesday afternoon.

Boston Police officers stood near the finish line of the Boston Marathon on Tuesday morning.

Special section

Coverage of the marathon bombings
Krystle Campbell, shown in July 2012, would have turned 30 on May 3. She was known as a tireless worker and a loyal friend and relative.

Krystle Campbell, ever reliable
A photo of Martin Richard, the 8-year-old boy killed in the Marathon bombing, holding this sign has come to symbolize the tragedy worldwide.

Martin Richard, a symbol to many
Boston Marathon bomb scene pictures taken by investigators show the remains of an explosive device.

Photo gallery

Bomb remnants

More coverage of the blasts

At hospitals, training for disasters gets put to test

At trauma centers across Boston Monday, doctors and nurses were pulled from treating routine chest pain and twisted ankles.

Nation & World

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Ricin sent in letter to Obama, early tests show

The letter comes a day after one with ricin was sent to a Mississippi senator. Two suspicious letters were also sent to Senator Jeff Flake’s Phoenix office.

Opinion on the bombings

JOANNA WEISS

How do you tell a child about the Boston Marathon blasts?

This is school vacation week, and kids are expecting a week of heightened fun. How do you reconcile that with the terrible events of Monday?

Sports

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Matt Reis

Father-in-law of Revolution's Matt Reis injured in bombing

Reis said his father-in-law, John Odom, is still in critical condition after being near Marathon Sports and the site of the first bomb.

Metro

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John J. O'Brien, former Massachusetts Department of Probation commissioner, now faces a federal case, but the date has not been set. He had resigned in 2010.

Former Mass. probation chief acquitted of conspiracy

John O’Brien was found not guilty in Suffolk Superior Court of multiple counts of conspiracy to commit bribery.

Business

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Wireless networks have not handled the sudden increases during disasters like hurricanes and the explosions that rocked the Boston Marathon and its fans on Monday.

Cellphone networks overwhelmed after blasts in Boston

Wireless networks have not handled increases during disasters like the explosions that rocked the Boston Marathon.

Food & dining

A plate of gluten-free chickpea pasta from Rialto in Cambridge.

Gluten: fact or fad or a bit of both?

A gluten-free diet is important to millions, but its significance may be overblown.

Note to subscribers

All BostonGlobe.com stories are available to non-subscribers right now for coverage of the Boston Marathon explosions.

  

Magazine

The cover for the April 14 2013 issue

Greetings from Gun Valley
The cover for the April 7 2013 issue

The complete guide to Boston's food trucks
The cover for the March 31 2013 issue

The great running experiment
The cover for the March 24 2013 issue

Azores, a perfect destination for Boston travelers

Opinion

“The attack on the Boston Marathon was an assault on our civic life, our very ability to have fun together. So it is up to all of us to go the distance to make sure the Marathon survives.”

Derrick Z. Jackson