Ukrainian ecology minister Ostap Semerak warns of a major nuclear disaster if pro-Russia separatists go forward with a plan to flood a mine where a small nuclear weapon was tested in the 1970s. Semerak appeals for international assistance to prevent the flooding.
The European Union proposes offering Ukraine visa-free travel to its members. However, it is still unclear how fast the liberalization process will be dealt with in the European Parliament and European Council, where some EU member states might want to slow down the process.
Ukraine bans government officials from publicly criticizing the work of state institutions and their colleagues, after damaging disclosures last month that highlighted slow progress in fighting corruption.
Russian President Vladimir Putin formally asks the Federation Council of the Russian Parliament for approval to use armed forces in Ukraine. He receives unanimous support. The Council also demands for President Putin to recall the Russian Federation ambassador to the United States.
More than 100,000 people protest in Kiev, Ukraine, against the decision of Viktor Yanukovych's government to suspend preparations for signing of the association agreement with the European Union under pressure from Russia.