As news of the ambush and slaying of five police officers following a peaceful Dallas protest on Thursday began to break, city leaders, politicians and celebrities began to issue statements on social media.
"Murdering the innocent is always evil, never more so than when the lives taken belong to those who protect our families and communities," said Former President George W. Bush, who resides in Dallas with his wife Barbara.
Both presidential candidates reacted to the tragedy. Donald Trump offered prayers and condolences then postponed a speech on economic opportunity in Miami. Hillary Clinton tweeted, "I mourn for the officers who were shot while doing their sacred duty," and canceled a campaign stop in Scranton, Pennsylvania, with Vice President Joe Biden.
House Speaker Paul Ryan said anger over the police shootings in Dallas must not be allowed to harden the nation's divisions. Speaking Friday on the House Floor, Ryan said it had been a "long month for America" and that the nation has seen terrible and senseless things.
But in debating how to respond, he urged unity. "A few perpetrators of evil do not represent us; they do not control us," he said.
House Minority Leader Nancy Pelosi took the floor after Ryan, joining in his expression of grief and thanking Dallas police officers for their service.
Among the celebrities, Lady Gaga took to Twitter imploring people to "stick together during this divided time."
Some of those posts can be seen below: