Pro-European Ukrainians take their fury out through memes.
Ukrainian President Viktor Yanukovych reportedly blamed his decision to not sign an agreement with the EU on Russian economic "blackmail," but many Ukrainians accuse him of betraying the country. This picture of him and Putin is captioned, "Sold!"
Via Twitter: @SayFix
Protesters are gathering at Independence Square in Kiev, or the Maidan, the site of huge demonstrations against Yanukovych during 2004's Orange Revolution. Organizers are using the hashtag #євромайдан. Friday is the revolution's ninth anniversary.
Gleb Garanich / Reuters