Russia could launch a 'full scale' invasion that would see troops overrun Ukraine in hours, a senior security official warned today. The secretary of Ukraine's National Security and National Defence Committee Andriy Parubiy claimed Russia has 80,000 troops, 280 tanks and 170 aircraft massed on the border ready to invade. 'They are adding to this military potential,' he said. 'We have a critical situation on the entire southeastern border. The Russian army is only two to three hours from Kiev.' Ukraine's defences would be incapable in the face of a Russian invasion, he said.