Los Angeles Police Department Chief Jim McDonnell described some of those arrested by his department in light of the protests surrounding the area as organized groups of `Black Bloc`-type protesters - an apparent reference to a demonstration tactic that involves dressing in all-black and concealing one`s face with a ski mask or balaclava in an effort to become unidentifiable to authorities, writes CNN.

"They come prepared, and they`re very sophisticated," McDonnell told CNN`s Kaitlan Collins after having referred to these groups as "anarchists, if you will".

"They do have radio communications", he said. “They do move around. They do monitor police channels, and they`ll create distractions in order to draw us away from a scene we’re about to make arrests [at]".

McDonnell also confirmed that some of the weaponry found with these individuals included hammers used to break up concrete to throw at law enforcement, along with shrapnel-embedded commercial-grade fireworks.

Approximately 400 people have been arrested by the LAPD on the heels of the anti-ICE protests around the city, which have spread to other big cities. Despite this, McDonnell maintained that the majority of protests that have been taking place across the Los Angeles Metropolitan Area have been peaceful, particularly during daytime.

Parts of Los Angeles remain under curfew between 8 p.m. and 6 a.m.