Thousands of migrants have crossed into Poland from Belarus since July, and the country has already laid more than 150km of barbed wire coils along its border to stop them.
Poland, Latvia and Lithuania have all declared a state of emergency, with Lithuania in the process of building a 4m-high metal fence along its border with Belarus.
Amnesty International say it is illegal to force migrants back who are trying to claim asylum.
Jacek Saryusz-Wolski, MEP for the Law and Justice Party of Poland called the migrants "fake asylum seekers".
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