Kiev, Ukraine (CNN) -- A convoy of 280 Russian trucks headed for Ukraine, which Moscow says is carrying relief goods for war-weary civilians, has suddenly changed course, according to a Ukrainian state news agency. With thousands of Russian troops still posted near the Ukrainian border and Ukraine's military putting increasing pressure on pro-Russian fighters around the city of Donetsk, many in Ukraine and elsewhere fear that the so-called humanitarian mission is actually an attempt to smuggle supplies to pro-Russian rebels. "Russia keeps inventing new excuses for their policy," Ukraine's deputy foreign minister, Danylo Lubkivsky, said Tuesday in Kiev. "In Georgia, it was defending pro-Russian minorities. In Ukraine's Crimea, preventing NATO invasion."
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New: Red Cross says it made contact with convoy
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Ukrainian media say Russian trucks bypassed expected checkpoint
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Russians say convoy contains aid for war-weary civilians
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The convoy comes as Ukraine makes strides against pro-Russian rebels
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If the trucks cross the border and before they reach the area controlled by separatists, they would have to be examined by Ukrainian border guards, a @placeholder security official said.
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At that point, the convoy would be handed over to @placeholder representatives, the official said.
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The Ukrainian border service denied reports that the convoy had crossed from @placeholder.