Barack Obama extends condolences to Dallas mayor after police shootings

President Barack Obama said early Friday that while recent police-involved shooting incidents in the USA are "symptomatic of a broader set of racial disparities that exist in our criminal justice system", it's a concern that should trouble all Americans.

Obama was speaking from the Polish capital, Warsaw, where he is attending a North Atlantic Treaty Organisation summit following Britain's decision to leave the European Union (EU) on 23 June.

Obama is speaking from Warsaw, Poland, where he's meeting with leaders of the European Union and attending a North Atlantic Treaty Organisation summit.

"To admit we've got a serious problem in no way contradicts our respect and appreciation for the vast majority of police officers who put their lives on the line to protect us every single day", Obama said.

Obama expressed his "deepest condolences to the American people" at a time where tensions between the country's black community and law enforcement are running high following the killings of Philando Castile and Alton Sterling.

Obama argued there's no contradiction between supporting law enforcement and working to see that biases in the justice system are rooted out.

Abbott said in a release early Friday morning that he would be heading directly to Dallas.

Obama says America is horrified over the shootings and that there was no possible justification for them.

"So when people say 'Black Lives Matter, ' that doesn't mean blue lives don't matter", he said, referring to police.

But even then, Obama was careful to acknowledge police officers who had lost their lives.

Dallas police chief David O. Brown said in a statement that three of the officers who were injured are in critical condition Thursday night.

Police in Dallas say they're trying to sort through what happened when gunshots rang out during a protest over two recent fatal police shootings. "The entire city of Dallas feels this to its core".

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.

Four Dallas police officers and one Dallas Area Rapid Transit officer were fatally shot Thursday night.

Barack Obama said his team is keeping him updated on the investigation and that he would have more to say as more details about the attack are learned.

A witness told KTVT, "Whoever was shooting had an assault rifle - and I know guns".

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