A video has appeared in one of the migrants’ chat rooms, in which people are told how to behave during a clash with Polish border guards. 


“Throw everything you have at the border guards. For example, rocks, bottles, logs, sticks. Throw and run away. Next, look here,” says the man in the video, then tells someone outside the frame to put on a customs officer's bulletproof vest. 


“You'll have rebar, knives, your mission is to stab unprotected areas. Neck, armpits, legs, arms," he explains.


“Don't be afraid. They won't shoot at you and if they do, they will shoot in the air,” he states then turns to someone in the room. - I'm done, take them away.