Ukraine claims it has destroyed Russian vehicles that crossed border
President Petro Poroshenko tells David Cameron that forces have destroyed part of military convoy seen entering territory
Russia denies military vehicles entered Ukraine
Kremlin says guard unit is there to prevent ‘infiltration’ of its territory and denies any movement across the border
http://www.theguardian.com/world/2014/aug/15/russia-denies-ukraine-vehicles-military