Former Ukrainian presidents condemn Russia's interference in Crimean affairs

Three former presidents of Ukraine - Leonid Kravchuk, Leonid Kuchma and Viktor Yushchenko - say Russia is interfering in the internal affairs of Ukraine's Autonomous Republic of Crimea, supporting the separatist movement in the peninsula. 

The statement was made amid increasing tension in Simferopol, where rallies of supporters and opponents of the new central authorities are being held.