Former President George W. Bush and his wife, Laura, released a statement this morning on the attack that killed five Dallas police officers. 

They said:

Laura and I are heartbroken by the heinous acts of violence in our city last night.  Murdering the innocent is always evil, never more so than when the lives taken belong to those who protect our families and communities.

Laura and I have seen firsthand the dedication, professionalism, and courage of the Dallas Police Department.  Their commitment to safety and justice makes us proud to call Dallas home.  Our hearts go out to the families of the fallen.  We pray for the wounded officers to recover fully and quickly.  We commend Mayor Rawlings, Chief Brown, and all our city’s leaders and public servants who continue to organize an effective response to this tragedy.  And we join our fellow citizens in saluting the fine law enforcement officers in Dallas and across the country who put their own lives on the line to keep all lives safe.

President Obama commented from Poland earlier this morning, calling it a "vicious, calculated and despicable" attack and vowing that "justice will be done."

Donald Trump expressed his condolences to the victims on Twitter and postponed his speech in Miami.

Hillary Clinton and Bill Clinton tweeted:

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