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NATO: Russian forces at border

New buildup seen as attempt to counter Ukraine offensive

Posted: June 20, 2014 at 3:56 a.m.

Smoke rises from an explosion near a children's hospital following shelling from Ukrainian government forces in Slovyansk, Ukraine, Thursday, June 19, 2014. Heavy fighting raged near Krasnyi Liman, just east of the rebel stronghold of Slovyansk, a city in the Donetsk region that has been the epicenter of violence during the past two months. (AP Photo/Andrei Petrov)

MOSCOW -- Russia is resuming its military buildup along the Ukrainian border in an apparent attempt to intimidate its neighbor, NATO's chief said Thursday as Ukrainian government forces began a new offensive against pro-Moscow insurgents.

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