Although the German infantry was repelled and the assault of German tanks was stopped by two FT tanks sealing the northern gate of the fortress, by nightfall it became apparent that the German pressure made the situation very grave. Despite heavy losses, the German 20th Motorized Division and 10th Armoured Division captured the northern part of the citadel. Meanwhile, the combined 3rd Armoured Division and 2nd Armoured Division comprising the XXIInd Armoured Corps entered the area. The Poles were unable to resupply and the casualties rose to almost 40%.