Police agencies in Southern California were on heightened alert Thursday after snipers ambushed officers in Dallas where five police officers were shot and killed and seven injured in protests over a pair of fatal officer-involved shootings, authorities said.
Police agencies from Los Angeles to Orange County are monitoring the developments in Dallas closely.
Mayor Eric Garcetti said there were no threats, but said officers are remaining vigilant.
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"Our hearts break for what we've seen," he said in an phone interview with NBC4. "My heart goes out, all our hearts go out to those who have lost their family members."
LAPD Chief Charlie Beck called the shootings a "tragedy beyond belief."
"Blue lives matter, they are willingly given and senselessly taken," Beck wrote on Twitter.
Both the Los Angeles Police Department and the LA County Sheriff's Department are on heightened alert meaning they are ready to respond at a moment's notice to any situation that may come up here in Southern California.
Los Angeles police said they were monitoring protests across the city on Thursday, one of which was in South LA, but there were no issues there and they ended peacefully.