The shooter was arrested after firing from a car in several locations southwest of the capital. Antiterrorism prosecutors said they were exploring a racial or religious motive.

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German police said they had determined there was “no danger” after a plane mistakenly transmitted a code suggesting a possible hijacking onboard.

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The choice drew condemnation from Israel over Ms. Pillay’s role leading a U.N. commission that said the country had committed genocide against Palestinians.

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