LOS ANGELES (CNS) – All Glendale Police Department and Los Angeles County Sheriff’s Department patrol personnel were under orders today to pair up following the shooting that claimed the lives of five police officers in Dallas.

The Los Angeles County Sheriff’s Department order was made “under an abundance of caution,” said Deputy Guillermina Saldana of the Sheriff’s Information Bureau.

Glendale police Chief Robert Castro also issued an order for two-officer patrols, the Glendale News-Press reported. Castro ordered the redeployment as a precaution, as there are no known threats to Glendale police, police Sgt. Robert Willam told the newspaper.

“Today is another tough day for law enforcement,” Castro wrote in a department-wide email. “I want you and your families to know that I am proud of the outstanding work and sacrifices by each of you everyday. There is no greater worry for me, as your chief, than your safety and health.”

Los Angeles police Chief Charlie Beck planed to comment on the Dallas slayings at a recruit graduation ceremony this morning. LAPD officers will wear mourning bands in honor of the slain officers, Beck tweeted earlier today. He called the killings a “tragedy beyond belief.”

“Blue lives matter, they are willingly given and senselessly taken,” Beck wrote on Twitter.

Messages of sympathy and condolences were also tweeted by police departments in Anaheim, Newport Beach, Santa Ana, and Long Beach, the California Highway Patrol and the Los Angeles County Sheriff’s Department.

“LA County Sheriff sends compassion and prayers to those families who lost loved ones today,” said a sheriff department tweet.

Los Angeles Mayor Eric Garcetti tweeted Thursday, “Our hearts are with all of the victims and their families in Dallas. The horrific violence against @DallasPD is an attack on our democracy. All Americans must unite against hate, join together in peace+justice.”

California Attorney General Kamala D. Harris said in a statement this morning that “the horrific tragedy in Dallas is a grave reminder of the dangers our law enforcement officers face each day in service of their communities.”

“I pray for the officers who lost their lives, for their grieving families and our law enforcement brothers and sisters in Dallas,” said Harris, who is scheduled to address the first meeting of the Racial and Identity Profiling Advisory Board today in downtown Los Angeles.

“Last night’s unspeakable violence reminds me of these words from Dr. Martin Luther King, Jr., `Darkness cannot drive out darkness. Only light can do that. Hate cannot drive out hate. Only love can do that.’

“Violence only increases distrust and anger. I know firsthand that the relationship of trust between law enforcement and the communities we are sworn to serve is reciprocal. We honor the courage and sacrifice of law enforcement as we continue the important national dialogue around reforming our criminal justice system.”

Najee Ali, director of Project Islamic Hope, said Thursday he was “praying for the families of the law enforcement victims who were killed in Dallas.”

“We don’t support or condone any violence against anyone,” Ali said.

“That’s not the way of the civil rights movement.”    Ali had helped organize a rally earlier Thursday calling for justice for the families of Alton Sterling and Philando Castile who were killed in officer-involved shootings in Louisiana and Minnesota.

The LAPD was “closely monitoring” the situation in Dallas with officers ready to respond to any situation from any point, Officer Tony Im said. As of this morning, the LAPD had not been placed on tactical alert, and had not been ordered to deploy only two-officer patrol cars, said Officer Drake Madison.

The Los Angeles Police Protective League, the union that represents the LAPD rank-and-file, issued a statement this morning that said in part: “Our prayers and deepest sympathies go to the families and friends of the Dallas Police officers and Dallas Area Rapid Transit officers who were killed and injured in last night’s abhorrent acts of violence.”

“We also pray for the recovery of those officers who are severely injured so that no more families have to feel the pain and anguish of losing their loved one,” the LAPPL said in a statement. “To hunt, target and murder law enforcement officers who were working to protect the safety and the first amendment rights of protesters is pure evil.”