Key Points Russia's parliament has approved a request from President Vladimir Putin to deploy Russian troops in Ukraine The unrecognised new prime minister of Ukraine's Crimea region asked Mr Putin for assistance to maintain peace Pro-Russian protests have been reported in Kharkiv, Donetsk and Odessa - some have led to violent clashes Leading Ukrainian politician Vitali Klitschko has urged parliam
![As it happened: Ukraine crisis](https://cdn-ak-scissors.b.st-hatena.com/image/square/3b578d34433882bf9c5420b61468ac4002ac20b8/height=288;version=1;width=512/https%3A%2F%2Fnews.bbcimg.co.uk%2Fmedia%2Fimages%2F73302000%2Fjpg%2F_73302306_73302153.jpg)