NEW YORK, Nov. 1 (UPI) -- Sunday's New York City Marathon will be the site of the largest anti-terrorist operation the city has ever experienced, officials said.
In the wake of bombings at the Boston Marathon in April that killed three people and injured more than 260, federal authorities and New York police are working with U.S. intelligence agencies and are treating the marathon as a potential terrorist target.
Security has been raised to an unprecedented level, and includes bomb-sniffing dogs, explosives detection equipment, police boats and divers stationed on the city's waterways and the presence of thousands of additional security workers and plainclothes law enforcement officers, the newspaper Newsday reported Friday.
"Boston made us take a hard look at the way we secure these kinds of events. Nothing's being taken for granted in terms of security or threat assessment," and unidentified federal law enforcement source told the newspaper.
"It [security] will be tight," New York Police Department Commissioner Ray Kelly said. "It always is tight, but obviously we're going to pay particular attention to that this year."
The 26.2-mile marathon will pass through all five boroughs of the city, through varying urban landscapes and over bridges.