After several hours of trying to negotiate with Johnson, Dallas Police Chief David Brown said his department had no choice but to kill him with a bomb attached to a robot.

He urged protesters "to keep the conversations constructive and the actions lawful and peaceful", and said the best way to honor Sterling "is by not allowing violence to tear apart any more families".

Following the killing of at least five police officers in Dallas overnight, a former one-term congressman from IL ignited a firestorm with a now-deleted tweet threatening President Obama with "war" and warning Black Lives Matter demonstrators to "watch out".

Editor's note: Now you can get "5 Things You Need to Know Today" delivered to your inbox daily. "It is a traumatic experience in the deepest sense of the word".

Dallas' police chief says a suspect in the deadly overnight attack on police officers told negotiators that he acted alone and was unaffiliated with any group.

Several hundred protesters angry about recent police shootings of black men assembled across the street from Baton Rouge Police Department headquarters, temporarily blocking streets. "But just like there are a small percentage of bad politicians. preachers. teachers, there are a small percentage of bad police officers".

Authorities revealed that two civilians were injured in the shootings, which occurred as an otherwise peaceful protest was taking place in downtown Dallas.

Due to claims made by the gunman that he'd planted bombs in the area, Dallas police did an extensive search and said no explosives have been found. Those we have lost this week have come from different neighborhoods and backgrounds - but today, they are mourned by officers and residents, by family and friends - by men and women and children who loved them, who needed them and who will miss them always.

Philando Castile was shot by an officer in suburban St. Paul, Minn., on Wednesday; his girlfriend, live streaming video immediately after the shooting, said Castile had been reaching for his wallet, because police requested his ID, when he was shot. He says the nation can't tolerate "a lynching in the 21st century by someone wearing a blue uniform".

Choi said his office has not yet met with Castile's family, saying it wouldn't be appropriate until investigators completed their work.

Critics of the push to reform local police tactics have charged that Obama has not shown enough concern about police officers who are shot in the line of duty.

"There is no possible justification for these kinds of attacks or any violence against law enforcement", Mr. Obama added.

"We also know that when people are armed with powerful weapons, unfortunately it makes attacks like these more deadly and more tragic", he said.

"The suspect stated he wanted to kill white people, especially white officers", he said.

Alton Sterling, 37, was fatally shot Tuesday during a struggle with two police officers outside of a convenience store where he was selling CDs.

Rawlings, who says he spoke to the wounded officer, said Friday that the officer expressed sorrow at his loss and that he felt "people don't understand the danger of dealing with a protest".