Boston Marathon explosion: What we know

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By CNN Staff

(CNN) — In the aftermath of two bomb blasts near the finish line of Monday’s Boston Marathon, Boston police confirm two dead and 22 injured, according to Cheryl Fiandaca, head of media relations for the Boston police.

Other details:

— Boston’s fire chief told other law enforcement authorities that they have found what they believe is an unexploded explosive device, a government official tell CNN’s Joe Johns.

— A federal law enforcement source tells CNN’s Chris Cuomo that experts are working to dismantle another explosive device. The device is small and does not appear to contain shrapnel, but an explosion may generate shrapnel from places where the explosion was put, the source said.

— A cell phone service overload around the center of Boston is hampering the bombing investigation, two federal law enforcement sources tell CNN.

— The Boston Marathon Facebook page says: “There were two bombs that exploded near the finish line in today’s Boston Marathon. We are working with law enforcement to understand what exactly has happened.”

— Injured people are being treated in medical tents that had been erected near the marathon finish line to treat exhausted runners. Other injured are being taken to the several hospitals that are within two miles.

— A Massachusetts General Hospital spokeswoman tells CNN there are 22 injured at the hospital as of 5 p.m. Six of those injured are “critically injured.”

— Nine patients from the explosion were at Tufts Medical Center as of 4:10 p.m., according to spokesman Jeremy Leachan. No word on their conditions.

— There were no credible security threats ahead of the Boston Marathon, according to a state government official.

— All off-duty Boston police officers have been ordered to report to their districts, WHDH TV reported.

— More than 400 Massachusetts National Guard troops were already on duty, assigned to help local police keep the marathon route clear for runners.

— Boston police investigated whether a third explosion, at the John F. Kennedy Presidential Library, was connected to Monday’s two bombings at the Boston Marathon, Police Commissioner Ed Davis said. They decided it was related to a mechanical problem. The JFK School of Government at Harvard University in Cambridge — miles away from the library in the Dorchester section of Boston — was evacuated.

— Boston’s Mandarin Oriental hotel was evacuated as a precautionary measure ordered by Boston police, spokeswoman Molly Kinsella said. “With respect to the two explosions that occurred during the Boston Marathon near Copley Square, all colleagues and guests located at the hotel are accounted for and safe,” she said.

— Massachusetts Gov. Deval Patrick: “This is a horrific day in Boston. My thoughts and prayers are with those who have been injured. I have been in touch with the President, Mayor (Tom) Menino and our public safety leaders. Our focus is on making sure that the area around Copley Square is safe and secured. I am asking everyone to stay away from Copley Square and let the first responders do their jobs.”

— President Obama was briefed by Homeland Security adviser Lisa Monaco and other members of his senior White House staff in the Oval Office. The president called Mayor Menino and Gov. Patrick to express his concern for those who were injured and to make clear that his administration is ready to provide needed support as they respond to the incident.

— Homeland Security Secretary Janet Napolitano “has been notified of the incident in Boston,” an administration official said. “At her direction, DHS is in contact with state and local authorities and will provide whatever assistance is necessary in the investigation and response.”

— The Massachusetts Emergency Management Agency activated a Red Cross website to help people who might have been near the explosions but are unable to make a phone call check in with friends and family.

— A ground stop has been imposed on flights from New York’s LaGuardia airport into Boston.

— Metropolitan Police in Washington, D.C., are at a heightened level of security, according to D.C. police Public Affairs Specialist Saray Leon.

— Miami-Dade Police Deputy Director Juan Perez: “We are aware of the incident in Boston, Massachusetts, and are working vigilantly with our regional partners in law enforcement at the local, state and federal level. We have increased our security measures in those areas and sites deemed as critical infrastructures and will continue to monitor the situation.”

— New York City and San Francisco police have been placed on a heightened state of alert.

— Los Angeles Police are increasing security measures in and around Dodger Stadium for Monday night’s game against the San Diego Padres, an LAPD spokesman said. “We are reminding the public that if they see something, say something.” Lt. Andy Neiman said. “These precautions are strictly to reassure the public that they are safe and that their police department is aware of what is going on.”

— While all of state, local and federal agencies are on alert in the Southeast, there is no mobilization of any kind in Atlanta or elsewhere at this time, a federal law enforcement source said.

— The chief executive of Sunday’s upcoming London Marathon, Nick Bitel, issued a statement: “We are deeply saddened and shocked by the news from Boston. Our immediate thoughts are with the people there and their families. It is a very sad day for athletics and for our friends and colleagues in marathon running. Our security plan is developed jointly with the Metropolitan Police and we were in contact with them as soon as we heard the news.”

— London Met Police Chief Superintendent Julia Pendry said: “A security plan is in place for the London Marathon. We will be reviewing our security arrangements in partnership with London Marathon.”

— The Boston Bruin’s home game against Ottawa has been canceled for Monday night, with no make up date determined, the Nation Hockey League said.

— Candidates in next month’s primaries for the special U.S. Senate election in Massachusetts announced they were suspending campaign activity Monday as authorities continue to investigate apparent bombings at the Boston Marathon.

— New York Mayor Michael Bloomberg: “I have spoken with Police Commissioner Ray Kelly, and the NYPD has stepped up security at strategic locations and critical infrastructure, including our subways. Some of the security steps we are taking may be noticeable, including deployment of Critical Response Vehicles and additional police personnel, and others will not be. We have 1,000 members of the NYPD assigned to counter-terrorism duties, and they — along with the entire NYPD and the investments we have made in counter-terrorism infrastructure — are being fully mobilized to protect our city.”

— New York Gov. Andrew Cuomo: “I have directed state agencies, including the Division of Homeland Security and Emergency Services, State Police, the MTA and the Port Authority, to be on a heightened state of alert as we learn more about this incident. New York National Guard on Sunday sent three vehicles and 6 soldiers to support the Marathon, and they are on hand to assist with emergency response and work together with local authorities following this incident.”

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