Ukrainian President Viktor Yanukovych (C), European Council President Herman Van Rompuy (R) and European Commission President Jose Manuel Barroso (L) arrive at a press conference hall after EU-Ukraine Summit at EU headquarters in Brussels, capital of Belgium, on Feb. 25, 2013. (Xinhua/Ye Pingfan)

Ukrainian President Viktor Yanukovych attends a press conference after EU-Ukraine Summit at EU headquarters in Brussels, capital of Belgium, on Feb. 25, 2013. (Xinhua/Ye Pingfan)

Ukrainian President Viktor Yanukovych attends a press conference after EU-Ukraine Summit at EU headquarters in Brussels, capital of Belgium, on Feb. 25, 2013. (Xinhua/Ye Pingfan)

Ukrainian President Viktor Yanukovych (2nd L) talks with translator as he attends a press conference with European Council President Herman Van Rompuy (2nd R) and European Commission President Jose Manuel Barroso (1st R) after EU-Ukraine Summit at EU headquarters in Brussels, capital of Belgium, on Feb. 25, 2013. (Xinhua/Ye Pingfan)

European Commission President Jose Manuel Barroso attends a press conference after EU-Ukraine Summit at EU headquarters in Brussels, capital of Belgium, on Feb. 25, 2013. (Xinhua/Ye Pingfan)