Authorities anticipate possible terror attack over Fourth of Jul - WFSB 3 Connecticut

Authorities anticipate possible terror attack over Fourth of July holiday

Posted: Updated:
Authorities are on high alert amid a terror warning for July 4th weekend. (CBS News) Authorities are on high alert amid a terror warning for July 4th weekend. (CBS News)
NEW YORK CITY (CBS) -

Law enforcement agencies across the country are on high alert amid a terror warning for July 4th weekend. 

The warning follows calls by ISIS last week to take up arms against enemies during the holy month of Ramadan.  

In New York City, where one of the nation's biggest fireworks displays is set to take place, officials will be keeping an eye on things from the air and the ground.

"There's going to be very robust deployment of both patrol resources, plains clothes resources, technology," said New York Police Chief James Waters with the counter-terrorism unit. 

Sources told WCBS, officials will use dozens of mobile cameras to monitor the festivities.

Manhole covers will also be welded in place.

The developments follow a joint-intelligence bulletin issued last week, urging members of law enforcement to remain vigilant to prevent a possible terror attack on U.S. soil:

"I would say this is the most serious level of threat that I've seen since Sept. 11th," Rep. Peter King, R-NY said. 

While federal officials maintain there is no specific intelligence pointing to a threat, they remain concerned about ISIS. They are particularly focused on the group's use of social media to successfully recruit Americans and other Westerners.

"I think one of the reasons they're so successful is because they're perceived to have the momentum. They're perceived to be winning," Mike Morrell, who is CBS News Senior National Security Contributor said.

On Monday, 23-year-old Alaa Saadeh of New Jersey was charged with providing material support to ISIS.

According to the criminal complaint, Saadeh bought a plane ticket for his brother to fly overseas to join the terror group.

© 2015 CBS Interactive Inc. All Rights Reserved.