Polish President Bronislaw Komorowski has said that he believes security in Europe is impossible without the involvement of Ukraine.

Delivering a speech to Ukraine's parliament on Thursday, he said that his country pays a great deal of attention to the European choice of Ukraine, adding that it looks forward to Ukraine becoming fully European.

There is no free Poland without a free Ukraine, Komorowski said.

According to him, the Ukrainian military is defending not just the territory of Ukraine, but the whole of Europe.

He added that when Ukraine's sons die in the east of the country defending their independence they also die to protect Europe 'from revival of imperial thinking.'