"The U.N. helicopter was in the vicinity at the time of the bombing, and it took off and landed without damage, " said Josephine Guerrero, a spokeswoman for the mission.

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He said the SPLA had contacted the U.N. mission after seeing the helicopter near an SPLA command post but had been told it had no aircraft in the area.

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The U.N. is transporting therapeutic milk by helicopter to Kanya and Kanyabayonga to feed hundreds of malnourished children.

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