Story highlights "We've seen such tragedies far too many times," Obama wrote

The President's comments following fatal shootings in Louisiana and Minnesota

Warsaw, Poland (CNN) President Barack Obama said early Friday that Americans should feel outraged at episodes of police brutality since they're rooted in long-simmering racial discord.

Speaking in Warsaw immediately after landing here for a NATO summit, Obama called the shooting deaths of Alton Sterling and Philando Castile "tragedies" and demanded that the country as a whole "do better."

Confronting issues of race and violence yet again after a spate of similar incidents during his presidency, Obama delivered a fact-based argument that African-Americans are more likely to suffer at the hands of law enforcement.

Citing statistics showing minorities are more likely to be pulled over, searched or shot at by police, Obama said it was incumbent on the country to aim for better -- including recognizing deep-seated biases that must be "rooted out."

"If communities are mistrustful of the police, that makes those law enforcement offers who are doing a great job, who are doing the right thing, that makes their lives harder," Obama said, insisting that recognizing problems within law enforcement doesn't equate to being anti-police.

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