Ukraine calls up reservists after Russian deployment

Ukraine has announced it is calling up military reservists, following Russia's decision to allow deployment of troops. Acting President Olexander Turchynov had already ordered increased security at key sites, including nuclear plants. US President Barack Obama has called the Russian decision a "violation of Ukrainian sovereignty". Ukraine has said it will seek the help of US and UK leaders in guaranteeing its security. Nato has called emergency talks to be held on Sunday at 1200 GMT. Announcing the mobilisation of reservists, Andriy Parubiy, chair of the national security and defence council of Ukraine, also said the armed forces would be put on to "full combat readiness", according to BBC.