1.3.14 President Obama: "Any violation of Ukraine sovereignty would be deeply destabilising" video 2.55min US President Barack Obama has warned Russia there will be "costs" for any military intervention in Ukraine. Oleg Boldyrev, BBC Russian, Simferopol: "Reports came in that fibre optic lines connecting Crimea to the rest of Ukraine were either blocked or damaged. If the mobile or internet connection goes down, it will be the most palpable indication yet of an emergency situation for the local people.