Probably usually used in undercover operations.
They must be using them as a form of crowd control. Sounds like every siren in the city is going off.
LAPD Officer to streamers: This is already an unlawful assembly. We're going to start making arrests.
Last chance given to people remaining in area. They have 3 minutes to leave.
Three young kids on balcony being spotlighted…may have been some of those throwing objects at police.