Security ramps up in Philadelphia as America 250 celebrations begin

PHILADELPHIA (WPVI) -- Security measures are increasing across Philadelphia as America's 250th birthday gets underway and officials prepare for large crowds ahead of the Fourth of July.

Barriers, cameras and a visible law enforcement presence have been deployed around historic sites throughout the city. The security operation includes multiple agencies working together, including Philadelphia police, counterterrorism units, U.S. park rangers, SWAT teams and police departments from surrounding counties.

Visitors said the heightened security was noticeable.

"It's great seeing the security; I've seen police officers out there," said Perry Loskamp of Long Island.

Officials say large-scale public events require extensive planning because they can be attractive targets for potential attackers.

"Our foreign adversaries who would love to embarrass the United States while it's celebrating its birthday," said Don Mihalek, a retired senior Secret Service agent.

Mihalek said there are no specific credible threats to the events but noted that security officials remain alert to a range of potential risks.

"But they are tracking a lot of threat activity, generally speaking from foreign state actors, lone wolf actors who look at mass gathering events as targets of opportunity," Mihalek said.

People visiting the city said they welcomed the visible security presence during the celebrations.

"It makes me feel safe seeing all the security," said Jennifer Schock of San Diego.

"I don't feel uneasy. It's a positive police presence," said Jay Smith of Old City.

Officials are encouraging attendees not only to feel safe but also to remain vigilant and report any suspicious activity.

"I'm not too worried. I'm not too concerned, but I am aware, very aware," said Shawn Coleman of Old City.

As the holiday festivities continue, law enforcement agencies will maintain a heightened presence throughout celebration areas while urging the public to stay alert and enjoy the events safely.