Reuters International

U.S. President Barack Obama participates in an onstage interview at the South by Southwest Interactive in Austin, Texas, March 11, 2016. REUTERS/Jonathan Ernst

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WASHINGTON (Reuters) - U.S. President Barack Obama said on Friday there is no doubt that civilians have been killed in U.S. drone strikes targeting suspected terrorists, and procedures are constantly evaluated.

He told a news conference at the end of a nuclear security summit that there had been "legitimate criticism" of the legal framework for the drone strikes and "there is no doubt that civilians were killed that shouldn't have been."

(Reporting by Washington Newsroom; Editing by James Dalgleish)

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