According to the German newspaper''Suddeutsche Zeitung, Poroshenko told European Commission President Jose Manuel Barroso about these threats by Putin on September 12.
The newspaper has obtained the protocol of the discussion between Barroso and Poroshenko, which was prepared by the EU's Foreign Service.
Putin also told Poroshenko about his ability to influence various EU member states through bilateral contacts.
As reported, at the end of August, Putin threatened Barroso that he could capture Kiev within two weeks if he wanted to.