Medical workers aid injured people at the finish line of the 2013 Boston Marathon following an explosion in Boston, Monday, April 15, 2013. (AP Photo/Charles Krupa) ORG XMIT: MACK120
Updated: May 17, 2013 6:33AM
Authorities said Monday afternoon there is “no known threat” to Chicago, while police in Los Angeles, New York and London stepped up security after explosions at the Boston Marathon.
“We are closely monitoring events as they unfold in Boston and the City of Chicago’s public safety departments are actively communicating with our law enforcement partners both locally and throughout the country,” said Melissa Stratton, spokeswoman for the city’s 911 center. “At this time, we are not aware of any additional threats.”
An “all-call” message was transmitted to Chicago Police officers across the city to stay vigilant for suspicious activity and, in the event of an explosion, to beware of “secondary devices” intended for police and other first responders. Plainclothes officers were told to have their uniforms on hand, sources said.
In Boston, investigators were collecting videos from every possible location, an effort that will likely go on for days. They also will try to determine whether the explosive devices had the tell-tale signs of known bomb makers.
“They will look for the pieces,” said one law enforcement source who asked not to be named. “Then when they reconstruct the device they will try to match it up to other, known, signatures of bomb makers to see if there is a link to anyone under investigation or other bombs that have been examined. Most bomb makers stick with a single design and use it repeatedly.”
After the explosions, a temporary flight restriction was put in place over the city of Boston and federal buildings were shut down, sources said.
Los Angeles County Sheriff’s spokesman Steve Whitmore said his department has opened an emergency operations center, increased patrols for transit and other critical areas including the Los Angeles Dodgers game Monday night.
Paul Browne, chief spokesman for the New York Police Department, said Monday that critical response teams were deployed around the city. Officials were stepping up security at hotels and other prominent locations.
British police said they were reviewing security plans for Sunday’s London Marathon, which is the next major international marathon. A London Metropolitan Police spokesman said police were working with marathon officials to review security plans.
Contributing: Frank Main, Natasha Korecki and Associated Press