Explosões matam pelo menos 2 na Maratona de Boston; inúmeros feridos

Explosion at 117th Boston Marathon: Race day got started with 26 seconds of silence in honor of the victims of the Sandy Hook Elementary School shooting in Newtown, Conn., on Dec. 14. A little more than two hours later, the lead runners pass the Mile 26 marker, which has been decorated with the Newtown, Conn., seal and dedicated to the memory of those killed there.

By Vernon Loeb, Doug Struck and Jerry Markon, Updated: Monday, April 15, 7:17 PM

BOSTON — Two bombs exploded at the venerable Boston Marathon on Monday, killing two people, sending hundreds of runners scrambling for cover and rattling nerves around the nation, authorities said.

The blasts occurred in rapid succession as thousands of people were still running. Video footage showed an explosion off to the side as runners were nearing the finish line, with some toppling over from the concussion. Smoke rose into the air, and photos of the scene showed a sidewalk slicked with blood.

The explosions, occurring on the Patriot’s Day holiday that commemorates the Revolutionary War battles of Lexington and Concord, were as shocking in their symbolism as in their force. The Boston Marathon is a highly prestigious race and is as much a symbol of Boston as Fenway Park.

The repercussions extended from Massachusetts to Washington, where President Obama was briefed by top officials, the White House increased security, and the Justice Department and FBI mobilized to fully investigate what had happened.

Boston Marathon officials described the blasts near the finish line as originating from “two bombs.” Two federal law enforcement officials, speaking on condition of anonymity, confirmed that the blasts were caused by explosive devices.

In a brief appearance at the White House shortly after 6 p.m., Obama expressed sympathy for the victims of the blasts and said all the necessary resources of the federal government would be assigned to assist Boston officials in determining the cause of the explosions.

“We still do not know who did this or why, and people shouldn’t jump to conclusions before we have all the facts,” Obama said. “But make no mistake — we will get to the bottom of this.”

In addition to the two confirmed deaths, police said more than 20 people were injured. Other media reports placed the injury toll as more than 100 people.

Initial reports of another explosion at the John F. Kennedy Library in Boston turned out to be an unrelated fire. Massachusetts Gov. Deval Patrick urged people to “stay out of crowds” as they made their way home.

A CNN producer who was at the race said the first large explosion was followed about 10 seconds later by another blast. He said he saw at least five or six people who appeared to be injured.

Emergency personnel rushed to the area, and the street was quickly sealed off.

“I saw it go off and smoke billowed up. Everyone just stopped and hunched down,” said Pam Ledtke, 51, from Indianapolis, who was about 75 yards from the finish line when the explosions went off. “They didn’t know what to do,” Ledtke said.

“All of a sudden, people were screaming,” Ledtke added.

The explosions occurred shortly before 3 p.m. near the intersection of Boylston and Exeter streets. Local media reports said store fronts were blown out.

Many of the injured appeared to be spectators who were watching the race. About half of the nearly 27,000 participants had reportedly finished the race when the blasts occurred. The racers came from at least 56 countries and territories.

“I saw two explosions,” reported Boston Herald journalist Chris Cassidy, who was running in the marathon. “The first one was beyond the finish line. I heard a loud bang and I saw smoke rising.” The blast “looked like it was in a trash can or something,” he said. “There are at least a dozen that seem to be injured in some way.”

Police established a crime scene around the Prudential Center, which is near the finish line. The blast apparently occurred about 300 yards from the finish line.

Authorities in New York and Washington tightened security precautions in the wake of the blasts. The Bureau of Alcohol, Tobacco, Firearms and Explosives sent all of its bomb technicians, explosives officers, explosives specialists and canine officers from their Boston and New York field divisions to the scene, as well as some investigators from Washington.

Shortly after being notified around 3 p.m., Obama received a briefing from homeland security adviser Lisa Monaco and other members of his senior White House staff in the Oval Office. The president called Boston Mayor Tom Menino and Massachusetts Gov. Deval Patrick to express his concern for those who were injured and to make clear that his administration is ready to provide support.

Witnesses described a chaotic scene in the immediate aftermath of the blasts.

Paul Cummings, a 44-year-old runner from Portland, Oregon, was in the medical tent near the finish line getting a leg massage when the explosions occurred.

“It didn’t sound like a water main blowing or anything else — it sounded like a bomb,” Cummings said. “Maybe I watch too much TV or something, but as soon as I heard it, I knew it was a bomb. It was just a loud explosion, and then another. You can’t hear a noise like that and think anything good happened.”

As police started bringing wounded people into the tent, Cummings quickly got up and left. “I just thought, ‘I’m out of here.’ ”

He stepped out into Copley Square to wailing sirens, people shouting and crying and police imploring the crowds to leave the area.

Jay Hartford, 46, a nurse at Boston Children’s Hospital, was about 800 yards from the finish when he heard the explosions. He thought they were electrical and kept running. Then he saw smoke billowing across Boylston Street. Runners started to panic, he said.

“Some people hit the ground, in shock,” he said. “A woman [runner] was on her knees screaming” in fear, not injury.

Police along the route started pushing barriers across Boylston, to keep runners from approaching the finish line, he said.

“Stop, turn back!” the police shouted to oncoming runners, Hartford said.

Hartford called wife and four boys, whom he had just seen along the route, and told them to go straight home.

Hartford became choked up at the enormity of this calamity befalling one of Boston’s most beloved traditions.

“It was going to be my best marathon, but I feel I’ve got to get to work” at the hospital, Hartford said.

Boston.com sports producer Steve Silva also was near the finish line when the explosions occurred.

“It was just immediately [evident] there were injuries, right in the middle of the spectator crowds,” Silva said. “There was blood everywhere, there were victims being carried out on stretchers. I saw someone lose their leg. People are crying. People are confused.”

Medical workers from a nearby medical tent dashed to help the victims, the eyewitnesses said. Volunteers jumped over tables piled with Gatorade bottles to attend to the wounded.

John Hampson, 19, a photographer for the Tufts University student newspaper, said race officials yelled at the bystanders to flee, saying there was a third bomb that had not exploded.

“There was a huge cloud of smoke, like a giant ball” when the bombs went off, he said.

One explosive seemed to go off in a building and another in a crowd of onlookers about six people deep, he said.

“It was horrifying. I felt it, and I saw the cloud... It was awful. Then people were coming by on stretchers,” he said.

Mary Beth Sheridan in Boston, and Sari Horwitz, William Branigin, Lyndsey Layton, David Montgomery, Roxanne Roberts, Zachary A. Goldfarb, Philip Rucker, Jule Tate and Amy Gardner contributed to this report.