Transcript for Law Enforcement Ramps Up Security for July 4th Weekend
We begin with a heightened level of alert. Law enforcement as around as holiday weekend began and 14 of July celebration overseas has already been canceled over fears of an ice is inspired attack. ABC's Elizabeth her is tracking the latest good morning Elizabeth. Brian and read a good morning to you know authorities say every day officers are told to be aware of their surroundings but this holiday weekend. They've actually been warned to be extra alert with large crowds out celebrating. Sadly attracting possible attackers. From Los Angeles to Philadelphia Boston and Atlanta police this morning fully deployed. In New York City the state of the art command center is activated with heavily armed units on streets the water on the skies. On the Washington mall preparations also wonder way for every emergency. And this massive response at the Washington navy yard police say is proof they are ready for anything. Reports of an active shooter yesterday turned out to be a false alarm but this here comes as warnings are issued with the potential. We take every event here in Washington very serious and our posture remains extremely high for all special events and it will continue for the fourth. In addition to troubling social media chattering this year alone forty people with suspected ties to prices have been arrested in the US seven of them in the last two weeks so what bulletin was sent to 181000. Law enforcement agencies across the country to be -- we're of the lone wolf. Ice is inspired terrorists trying to stage attacks the concern. Also heightened following the recent attacks in France and Tunisia. To the military has now canceled fourth of July celebrations after US earpiece embracing New England. I think the threat is the most significant we faced since the September 11 attacks. Net to be clear officials stress no specific threats have been made but they know that our nation is under threat and they. Are not taking chances and Ryan back to you. So many on alerts thank you so much Elizabeth. Live in Washington.
This transcript has been automatically generated and may not be 100% accurate.