Extra patrol cars and police armed with rifles were stationed around the city Tuesday as New York remained in a heightened state of alert since two bombs exploded near the finish line of Monday's Boston Marathon, killing at least three people and injuring more than 170 others.
The major focuses include landmark locations such as the Empire State Building and World Trade Center site. Subways and commuter rails are also getting extra protection.
At a security briefing Tuesday, Police Commissioner Ray Kelly said police were also "certainly going to reevaluate" security for the New York City Marathon, held in the fall.
Police are also examining plans again for other upcoming large events, including a 5K run/walk to the Sept. 11 memorial on Sunday and a 4-mile race in Central Park.
Officials say no reports of any specific threats against New York have been reported, and these measures are being taken out of an abundance of precaution.
Police responded to multiple reports of possible suspicious packages in the city in the hours immediately following the Boston explosions, and authorities say such spikes in reports are common after any significant bombing attack. Kelly said police have received more than 70 such reports in the 24 hours after the bombing. By Wednesday morning, more than 130 such reports had been called in.
By mid-morning Tuesday, authorities had responded to reports of suspicious items in Chelsea, Times Square and Brooklyn; LaGuardia Airport's Central Terminal was briefly evacuated after someone spotted a possible suspicious package in a shopping area. In all four cases, any items found were harmless.
But the city is prepared in the event of an emergency, Mayor Bloomberg says. More than 1,000 counter-terrorism officers were assigned to protect New York City, and the NYPD sent out additional foot and squad patrols.
Bloomberg pledged support for Boston "now and in the days ahead," saying New Yorkers would not soon forget the support they received from Bostonians after 9/11.
While the mayor said the NYPD, working with federal and state authorities, thwarted attacks in the past, he said residents must remain vigilant and urged them to call authorities if they see anything suspicious.
"There remain people who want to attack us, and the moment we let our guard down ... is the moment that the terrorists are waiting for," Bloomberg said. "As a country we may not be able to thwart every attack but we must continue to do everything we possibly can to try."
On Long Island, Nassau County police have stepped up patrols, also as a precaution. County officials plan to meet Wednesday to discuss security preparations for the upcoming Long Island marathon, which is scheduled for May 5.
The New Jersey Marathon that finishes at the Long Branch boardwalk is also scheduled for that date, and Monmouth officials say they are examining security again for that event too.
Copyright Associated Press / NBC New York