Metro

After Boston bombings, 1,000 cops deployed to landmarks and transit sites

Wounded bomb victims lie sprawled amid a chilling, surreal scene in Boston.

Wounded bomb victims lie sprawled amid a chilling, surreal scene in Boston. (AP)

The NYPD boosted its presence in Times Square, scene of failed attack.

The NYPD boosted its presence in Times Square, scene of failed attack. (Tamara Beckwith/NY Post)

An NYPD officer inspects a man's bag in Grand Central Terminal in Manhattan.

An NYPD officer inspects a man’s bag in Grand Central Terminal in Manhattan. (Getty Images)

NYPD cops yesterday flooded city streets, landmarks and transit hubs — while scrutinizing live video feeds at key spots for suspicious activity — in the wake of the Boston Marathon bombings.

“This changes everything here,’’ one grim-faced source told The Post of yesterday’s terror attack.

“Everyone’s on high alert. Our marathon was canceled in November. Who knows if that changed someone’s plans [to attack in Boston instead of New York]?’’

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Seventh Avenue in Times Square looked like an NYPD parking lot, as blue-and-white patrol cars lined the streets and officers toted AR-15 rifles, which were commonly seen after the 9/11 attacks.

Mayor Bloomberg ordered the NYPD to mobilize its entire 1,000-member counterterrorism squad “to protect our city.”

Gov. Cuomo put the entire state on “heightened alert” and sent National Guard vehicles and soldiers to Boston to aid in its recovery efforts.

The Port Authority said it had voluntarily “heightened” security restrictions at and around airports and the World Trade Center.

Special attention was being paid to the Mandarin Oriental Hotel in Columbus Circle and the Bank of America Tower in Midtown because bombs in Boston were found near those branches, law-enforcement sources told the Post.

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Federal authorities told The Post that they viewed the Boston bombing as “a more successful version of the Times Square” attack in 2010.

In that attack, a homemade car bomb ended up failing to detonate — but if it had, it could have killed or injured hundreds, sources have said.

The feds recalled dozens of agents who were on leave or vacation to boost the region’s counterterrorism units.

Bomb-sniffing dogs were out in full force at Penn Station, making some travelers and vendors nervous.

“I came here and saw all the canines. It’s a little bit scary when something like this happens,” said Elin Sordsdhal, 49, who was headed to Boston by train. “That’s exactly what the terrorists want.”

The MTA said police patrols and baggage inspections were being increased on all subway lines, the LIRR and Metro-North.

“We’ll be paying additional attention to the subway system until we more fully understand what happened in Boston and the potential threat that exists,” an MTA spokesman told The Post.

Mahbub Kamal, 51, of Queens who sells phone cards at a Port Authority stand, said, “I have seen more cops today. Two of them had assault rifles.’’

Another vendor, Paul Alves, 24, of the Upper East Side, added, “I haven’t seen cops with assault weapons here for 10 years. I’m a little scared.

“But I just gotta do my job. Life goes on. Whatever happens happens.”

One jittery commuter tweeted last night: “The presence of the NYPD in the subways today is overwhelming and appreciated.’’

Additional reporting by Larry Celona, Jamie Schram and Wilson Dizard