Twenty-seven people were injured in a series of four explosions in Dnipropetrovs'k, in the center-east of Ukraine, the alleged attacks that the president Viktor Yanukovych has described as a "challenge to the country" which co-organized with Poland, the Euro 2012 football. "I know the same thing that you ( ... ). For the moment, there is no additional information, we know that there are a of the injured and we understand that this is a challenge to the entire country", said, quoted by Interfax, MR. Yanukovych during a displacement in the south of Ukraine. "The best investigators" will be mobilized, he promised. "I think that everything will clarify. It is unfortunate that this has happened", has once again added the head of State. The prosecutor of Dnipropetrovsk has opened an investigation in order to "terrorism" as a result of these incidents, indicated in the AFP the spokesman for the prosecutor general Margarita Velkova. The first explosion, which wounded 13, has occurred in a trash can near a tram stop in Dnipropetrovsk shortly before noon, according to the Ministry of Emergency Situations The second, which has 11 were injured, including nine children, occurred near a cinema a half-hour later. The third explosion occurred near a park injuring three people, according to the same source. The spokesman of the Ministry of the Interior Volodymyr Polichthouk for his part, has state of the "injured" by the fourth explosion, without specifying the balance sheet. The minister of the Interior, Vitaly Zakhartchenko, is expected to Dnipropetrovsk to personally supervise the investigation, according to the procurator general.