LAPD ramping up security on 4th of July due to ISIS threats

LOS ANGELES (KABC) -- Law enforcement will be on high alert this Fourth of July weekend from coast-to-coast over fears ISIS supporters in the United States may heed the group's call to carry out attacks.

"The threat stream is very high. In fact, we don't think it's been this high since 9/11," Los Angeles Police Deputy Chief Michael Downing said.

The Los Angeles Police Department, as well as local law enforcement across the country, are on heightened alert, increasing security measures as concern grows of radical extremists in the U.S.

"ISIL has spent about a year investing in trying to reach troubled minds in the United States through social media, to either recruit them to come to their so-called caliphate to fight or to kill where they stand," FBI director James Comey said.

The rash of deadly violence overseas, from the beach attack in Tunisia to Egypt Wednesday, where ISIS is taking credit for 15 simultaneous attacks killing dozens of soldiers, is prompting the nationwide warning.