As Ukraine’s parliament hears calls for constitutional change, opposition leader Vitaly Klitschko emerged empty-handed from his latest talks with President Viktor Yanukovych on Tuesday.<br /><br />The boxer turned politician accused President Yanukovych of “taking an irresponsible position” and “provoking people to take radical action”.<br /><br />The opposition wants constitutional change to curtail powers accumulated by Yanukovych, such as appointing the prime minister and entire government as well as regional governors.<br /><br />With crisis talks due to continue on Wednesday, Kyiv’s anti-Yanukovych demonstrators were spending another night in the cold.<br /><br />At least six people have been killed in violence during what started as pro-EU protests.<br /><br />Yanukovych triggered the uprising on the streets last November when he walked away from a trade deal with the European Union in favour of closer economic ties with Russia.<br /><br />The increasingly tense situation in Ukraine continues to cause global concern.<br /><br />Although there has been no violence in Kyiv for several days, Western governments have warned Yanukovych that it risks flaring up again unless he can find a compromise with the opposition.