Ukraine Volodymyr Sivkovych. Later the same day the General Prosecutor of Ukraine's Office handed "a notification on suspicion of abuse of power when ordering the police actions of 30 November 2013" out to Sivkovych and Popov; and to former Head of Kyiv police Valeriy Koriak and his Deputy Head Petro Fedchuk. According to Prosecutor General of Ukraine Viktor Pshonka "All four officials will soon be placed under home arrest". The previous day opposition leader Yatsenyuk had stated during the roundtable discussion "Those who made illegal orders, and those who executed them, must be held to account, for the whole country to see. Those who have been arrested as activists of the Maidan must be released – That is all". Meanwhile, on Maidan, popular Ukrainian rock band Okean Elzy performed to "possibly hundreds of thousands of Ukrainians," and estimates for the day placed over 200,000 in Kyiv to support the movement. The size of the protest held at 200,000 the following day, according to Interfax. U.S. senators Christopher Murphy (D-CT) and John McCain (R-AZ) addressed the crowds, expressing American support for their cause. EU Enlargement Commissioner Štefan Füle said the EU is stopping talks on the Association Agreement because of the Yanukovych administration's unreasonable demands, of which Ukrainian authorities have sought $27 billion in aid to sign. In a tweet issued by Füle, he said there was a divergence between the words and deeds of the president and government regarding the Association agreement, and that "their arguments have no grounds in reality." 17 December 2013 Ukrainian–Russian action plan Russian President Vladimir Putin and Ukrainian President Viktor Yanukovych held the sixth "interstate consultation" on 17 December in Moscow, where they signed the 17 December 2013 Ukrainian–Russian action plan. This consisted of the Russian National Wealth Fund buying $15 billion of Ukrainian Eurobonds and the cost of Russian natural gas supplied to Ukraine lowered to $268 per 1,000 cubic metres (this price was $400). As part of the action plan, Russia committed itself to the restoration of its customs regulations on imports from Ukraine that had existed before mid-August 2013. According to President Putin and Russian presidential press secretary Dmitry Peskov this deal was "not tied to any conditions" and Ukraine's possible accession to the Customs Union of Belarus, Kazakhstan, and Russia was not addressed. Peskov also added "it is our principled position not to interfere in Ukraine's affairs" and accused other countries